mirror of
https://github.com/sbrow/strings.git
synced 2025-12-29 15:17:38 -05:00
feat: Added more functions.
This commit is contained in:
@@ -1,3 +1,4 @@
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.envrc
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.envrc
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src
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src
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tsconfig.json
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flake.*
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flake.*
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@@ -1 +1,7 @@
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@sbrow/strings / [Exports](modules.md)
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@sbrow/strings / [Exports](modules.md)
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# Strings
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A small, simple, functional, and dependency-free library for JavaScript string manipulation.
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You can view the docs [here](./docs/modules.md)
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172
docs/modules.md
172
docs/modules.md
@@ -6,12 +6,100 @@
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### Functions
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### Functions
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- [afterFirst](modules.md#afterfirst)
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- [afterLast](modules.md#afterlast)
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- [endsWith](modules.md#endswith)
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- [endsWith](modules.md#endswith)
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- [ltrim](modules.md#ltrim)
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- [ltrim](modules.md#ltrim)
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- [rtrim](modules.md#rtrim)
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- [startsWith](modules.md#startswith)
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- [startsWith](modules.md#startswith)
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- [trim](modules.md#trim)
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## Functions
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## Functions
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### afterFirst
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▸ **afterFirst**<`P`, `G`, `R`\>(`...p`): `RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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Curry a [[Function]]
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**`Example`**
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```ts
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import {F} from 'ts-toolbelt'
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/// If you are looking for creating types for `curry`
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/// It handles placeholders and variable arguments
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declare function curry<Fn extends F.Function>(fn: Fn): F.Curry<Fn>
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```
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#### Type parameters
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| Name | Type |
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| :------ | :------ |
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| `P` | extends [separator: string \| typeof \_, str: string \| typeof \_] |
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| `G` | extends readonly `any`[] = `GapsOf`<`P`, [separator: string, str: string]\> |
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| `R` | extends `unknown` = `string` |
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#### Parameters
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| Name | Type |
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| :------ | :------ |
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| `...p` | `P` \| [separator: string \| typeof \_, str: string \| typeof \_] |
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#### Returns
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`RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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[[Function]]
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#### Defined in
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node_modules/ts-toolbelt/out/Function/Curry.d.ts:77
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___
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### afterLast
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▸ **afterLast**<`P`, `G`, `R`\>(`...p`): `RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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Curry a [[Function]]
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**`Example`**
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```ts
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import {F} from 'ts-toolbelt'
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/// If you are looking for creating types for `curry`
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/// It handles placeholders and variable arguments
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declare function curry<Fn extends F.Function>(fn: Fn): F.Curry<Fn>
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```
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#### Type parameters
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| Name | Type |
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| :------ | :------ |
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| `P` | extends [separator: string \| typeof \_, str: string \| typeof \_] |
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| `G` | extends readonly `any`[] = `GapsOf`<`P`, [separator: string, str: string]\> |
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| `R` | extends `unknown` = `string` |
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#### Parameters
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| Name | Type |
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| :------ | :------ |
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| `...p` | `P` \| [separator: string \| typeof \_, str: string \| typeof \_] |
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#### Returns
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`RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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[[Function]]
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#### Defined in
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node_modules/ts-toolbelt/out/Function/Curry.d.ts:77
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___
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### endsWith
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### endsWith
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▸ **endsWith**<`P`, `G`, `R`\>(`...p`): `RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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▸ **endsWith**<`P`, `G`, `R`\>(`...p`): `RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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@@ -84,6 +172,48 @@ node_modules/ts-toolbelt/out/Function/Curry.d.ts:77
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___
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___
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### rtrim
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▸ **rtrim**<`P`, `G`, `R`\>(`...p`): `RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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Curry a [[Function]]
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**`Example`**
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```ts
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import {F} from 'ts-toolbelt'
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/// If you are looking for creating types for `curry`
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/// It handles placeholders and variable arguments
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declare function curry<Fn extends F.Function>(fn: Fn): F.Curry<Fn>
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```
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#### Type parameters
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| Name | Type |
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| :------ | :------ |
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| `P` | extends [cutset: string \| typeof \_, str: string \| typeof \_] |
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| `G` | extends readonly `any`[] = `GapsOf`<`P`, [cutset: string, str: string]\> |
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| `R` | extends `unknown` = `string` |
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#### Parameters
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| Name | Type |
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| :------ | :------ |
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| `...p` | `P` \| [cutset: string \| typeof \_, str: string \| typeof \_] |
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#### Returns
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`RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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[[Function]]
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#### Defined in
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node_modules/ts-toolbelt/out/Function/Curry.d.ts:77
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___
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### startsWith
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### startsWith
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▸ **startsWith**<`P`, `G`, `R`\>(`...p`): `RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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▸ **startsWith**<`P`, `G`, `R`\>(`...p`): `RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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@@ -123,3 +253,45 @@ declare function curry<Fn extends F.Function>(fn: Fn): F.Curry<Fn>
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#### Defined in
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#### Defined in
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node_modules/ts-toolbelt/out/Function/Curry.d.ts:77
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node_modules/ts-toolbelt/out/Function/Curry.d.ts:77
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___
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### trim
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▸ **trim**<`P`, `G`, `R`\>(`...p`): `RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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Curry a [[Function]]
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**`Example`**
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```ts
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import {F} from 'ts-toolbelt'
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/// If you are looking for creating types for `curry`
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/// It handles placeholders and variable arguments
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declare function curry<Fn extends F.Function>(fn: Fn): F.Curry<Fn>
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```
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#### Type parameters
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| Name | Type |
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| :------ | :------ |
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| `P` | extends [cutset: string \| typeof \_, str: string \| typeof \_] |
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| `G` | extends readonly `any`[] = `GapsOf`<`P`, [cutset: string, str: string]\> |
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| `R` | extends `unknown` = `any` |
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#### Parameters
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| Name | Type |
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| :------ | :------ |
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| `...p` | `P` \| [cutset: string \| typeof \_, str: string \| typeof \_] |
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#### Returns
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`RequiredKeys`<`ObjectOf`<`G`\>\> extends `never` ? `R` : `Curry`<(...`p`: `G`) => `R`\>
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[[Function]]
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#### Defined in
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node_modules/ts-toolbelt/out/Function/Curry.d.ts:77
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7
lib/index.d.ts
vendored
7
lib/index.d.ts
vendored
@@ -1,6 +1,5 @@
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export * from './trim';
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export declare const startsWith: import("ts-toolbelt/out/Function/Curry").Curry<(needle: string, haystack: string) => boolean>;
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export declare const startsWith: import("ts-toolbelt/out/Function/Curry").Curry<(needle: string, haystack: string) => boolean>;
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export declare const endsWith: import("ts-toolbelt/out/Function/Curry").Curry<(needle: string, haystack: string) => boolean>;
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export declare const endsWith: import("ts-toolbelt/out/Function/Curry").Curry<(needle: string, haystack: string) => boolean>;
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/**
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export declare const afterFirst: import("ts-toolbelt/out/Function/Curry").Curry<(separator: string, str: string) => string>;
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* Trims characters from the left side of a string.
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export declare const afterLast: import("ts-toolbelt/out/Function/Curry").Curry<(separator: string, str: string) => string>;
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*/
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export declare const ltrim: import("ts-toolbelt/out/Function/Curry").Curry<(cutset: string, str: string) => string>;
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38
lib/index.js
38
lib/index.js
@@ -1,31 +1,29 @@
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"use strict";
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"use strict";
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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var desc = Object.getOwnPropertyDescriptor(m, k);
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if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
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desc = { enumerable: true, get: function() { return m[k]; } };
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}
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Object.defineProperty(o, k2, desc);
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}) : (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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o[k2] = m[k];
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}));
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var __exportStar = (this && this.__exportStar) || function(m, exports) {
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for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.ltrim = exports.endsWith = exports.startsWith = void 0;
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exports.afterLast = exports.afterFirst = exports.endsWith = exports.startsWith = void 0;
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const utils_1 = require("./utils");
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const utils_1 = require("./utils");
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__exportStar(require("./trim"), exports);
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function escapeRegExp(str) {
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function escapeRegExp(str) {
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return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
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return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
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}
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}
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exports.startsWith = (0, utils_1.curry)((needle, haystack) => haystack.indexOf(needle) === 0);
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exports.startsWith = (0, utils_1.curry)((needle, haystack) => haystack.indexOf(needle) === 0);
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exports.endsWith = (0, utils_1.curry)((needle, haystack) => (new RegExp(`${escapeRegExp(needle)}$`)).test(haystack));
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exports.endsWith = (0, utils_1.curry)((needle, haystack) => (new RegExp(`${escapeRegExp(needle)}$`)).test(haystack));
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/**
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exports.afterFirst = (0, utils_1.curry)((separator, str) => str.substring(str.indexOf(separator) + 1, str.length));
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* Trims characters from the left side of a string.
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exports.afterLast = (0, utils_1.curry)((separator, str) => str.substring(str.lastIndexOf(separator) + 1, str.length));
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*/
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exports.ltrim = (0, utils_1.curry)((cutset, str) => {
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const _trim = (x) => (0, exports.ltrim)(cutset)((0, utils_1.tail)(x));
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// const _trim = compose(ltrim(cutset), tail);
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const trimmed = () => (0, utils_1.when)((x = '') => cutset.includes(x.charAt(0)), _trim)(str);
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return (0, utils_1.isEmpty)(cutset) || (0, utils_1.isEmpty)(str)
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? str
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: trimmed();
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});
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// export const afterFirst = curry(
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// /**
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// * @param {String} separator
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// * @param {String} str
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// * @return {String}
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// */
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// (separator, str) => str.substring(str.indexOf(separator) + 1, str.length),
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// );
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// export const beforeFirst = curry(
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// export const beforeFirst = curry(
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// /**
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// /**
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// *
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// *
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6
lib/ltrim.d.ts
vendored
Normal file
6
lib/ltrim.d.ts
vendored
Normal file
@@ -0,0 +1,6 @@
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/**
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|
* Trims characters from the left side of a string.
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*/
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export declare const ltrim: import("ts-toolbelt/out/Function/Curry").Curry<(cutset: string, str: string) => string>;
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export declare const rtrim: import("ts-toolbelt/out/Function/Curry").Curry<(cutset: string, str: string) => string>;
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export declare const trim: import("ts-toolbelt/out/Function/Curry").Curry<(cutset: string, str: string) => any>;
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25
lib/ltrim.js
Normal file
25
lib/ltrim.js
Normal file
@@ -0,0 +1,25 @@
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|
"use strict";
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|
Object.defineProperty(exports, "__esModule", { value: true });
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exports.trim = exports.rtrim = exports.ltrim = void 0;
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const utils_1 = require("./utils");
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/**
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* Trims characters from the left side of a string.
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*/
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exports.ltrim = (0, utils_1.curry)((cutset, str) => {
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const _trim = (x) => (0, exports.ltrim)(cutset)((0, utils_1.tail)(x));
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// const _trim = compose(ltrim(cutset), tail);
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const trimmed = () => (0, utils_1.when)((x = '') => cutset.includes(x.charAt(0)), _trim)(str);
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return (0, utils_1.isEmpty)(cutset) || (0, utils_1.isEmpty)(str)
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? str
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: trimmed();
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});
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exports.rtrim = (0, utils_1.curry)((cutset, str) => {
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const _trim = (x) => (0, exports.rtrim)(cutset)(x.substring(0, x.length - 1));
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// const _trim = compose(rtrim(cutset), init);
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const trimmed = () => (0, utils_1.when)((x = '') => cutset.includes(x.charAt(x.length - 1)), _trim)(str);
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return (0, utils_1.isEmpty)(cutset) || (0, utils_1.isEmpty)(str)
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? str
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: trimmed();
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});
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// const trim = curry((cutset: string, str: string) => compose(ltrim(cutset), rtrim(cutset))(str));
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exports.trim = (0, utils_1.curry)((cutset, str) => (0, exports.ltrim)(cutset)((0, exports.rtrim)(cutset, str)));
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6
lib/trim.d.ts
vendored
Normal file
6
lib/trim.d.ts
vendored
Normal file
@@ -0,0 +1,6 @@
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|||||||
|
/**
|
||||||
|
* Trims characters from the left side of a string.
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||||||
|
*/
|
||||||
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export declare const ltrim: import("ts-toolbelt/out/Function/Curry").Curry<(cutset: string, str: string) => string>;
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||||||
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export declare const rtrim: import("ts-toolbelt/out/Function/Curry").Curry<(cutset: string, str: string) => string>;
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||||||
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export declare const trim: import("ts-toolbelt/out/Function/Curry").Curry<(cutset: string, str: string) => any>;
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25
lib/trim.js
Normal file
25
lib/trim.js
Normal file
@@ -0,0 +1,25 @@
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|
"use strict";
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||||||
|
Object.defineProperty(exports, "__esModule", { value: true });
|
||||||
|
exports.trim = exports.rtrim = exports.ltrim = void 0;
|
||||||
|
const utils_1 = require("./utils");
|
||||||
|
/**
|
||||||
|
* Trims characters from the left side of a string.
|
||||||
|
*/
|
||||||
|
exports.ltrim = (0, utils_1.curry)((cutset, str) => {
|
||||||
|
const _trim = (x) => (0, exports.ltrim)(cutset)((0, utils_1.tail)(x));
|
||||||
|
// const _trim = compose(ltrim(cutset), tail);
|
||||||
|
const trimmed = () => (0, utils_1.when)((x = '') => cutset.includes(x.charAt(0)), _trim)(str);
|
||||||
|
return (0, utils_1.isEmpty)(cutset) || (0, utils_1.isEmpty)(str)
|
||||||
|
? str
|
||||||
|
: trimmed();
|
||||||
|
});
|
||||||
|
exports.rtrim = (0, utils_1.curry)((cutset, str) => {
|
||||||
|
const _trim = (x) => (0, exports.rtrim)(cutset)(x.substring(0, x.length - 1));
|
||||||
|
// const _trim = compose(rtrim(cutset), init);
|
||||||
|
const trimmed = () => (0, utils_1.when)((x = '') => cutset.includes(x.charAt(x.length - 1)), _trim)(str);
|
||||||
|
return (0, utils_1.isEmpty)(cutset) || (0, utils_1.isEmpty)(str)
|
||||||
|
? str
|
||||||
|
: trimmed();
|
||||||
|
});
|
||||||
|
// const trim = curry((cutset: string, str: string) => compose(ltrim(cutset), rtrim(cutset))(str));
|
||||||
|
exports.trim = (0, utils_1.curry)((cutset, str) => (0, exports.ltrim)(cutset)((0, exports.rtrim)(cutset, str)));
|
||||||
@@ -1,7 +1,7 @@
|
|||||||
import { describe, expect, it } from 'vitest';
|
import { describe, expect, it } from 'vitest';
|
||||||
import fc from 'fast-check';
|
import fc from 'fast-check';
|
||||||
import {
|
import {
|
||||||
/*afterFirstWord, beforeFirstWord, */ endsWith, ltrim, startsWith,
|
/*afterFirstWord, beforeFirstWord, */ afterFirst, afterLast, endsWith, ltrim, rtrim, trim, startsWith,
|
||||||
} from './index';
|
} from './index';
|
||||||
|
|
||||||
describe('strings', () => {
|
describe('strings', () => {
|
||||||
@@ -35,6 +35,24 @@ describe('strings', () => {
|
|||||||
}));
|
}));
|
||||||
})
|
})
|
||||||
});
|
});
|
||||||
|
describe('afterFirst', () => {
|
||||||
|
it('removes everything before the first needle when possible', () => {
|
||||||
|
expect(afterFirst(' ', 'foo bar bat')).toBe('bar bat');
|
||||||
|
})
|
||||||
|
|
||||||
|
it('removes nothing when needle is not present', () => {
|
||||||
|
expect(afterFirst('&', 'foo bar bat')).toBe('foo bar bat');
|
||||||
|
})
|
||||||
|
})
|
||||||
|
describe('afterLast', () => {
|
||||||
|
it('removes everything after the last needle when possible', () => {
|
||||||
|
expect(afterLast(' ', 'foo bar bat')).toBe('bat');
|
||||||
|
})
|
||||||
|
|
||||||
|
it('removes nothing when needle is not present', () => {
|
||||||
|
expect(afterLast('&', 'foo bar bat')).toBe('foo bar bat');
|
||||||
|
})
|
||||||
|
})
|
||||||
// describe('afterFirstWord', () => {
|
// describe('afterFirstWord', () => {
|
||||||
// it('removes the first word', () => {
|
// it('removes the first word', () => {
|
||||||
// fc.assert(fc.property(fc.string(), (str) => {
|
// fc.assert(fc.property(fc.string(), (str) => {
|
||||||
@@ -49,37 +67,4 @@ describe('strings', () => {
|
|||||||
// }));
|
// }));
|
||||||
// });
|
// });
|
||||||
// });
|
// });
|
||||||
describe('ltrim', () => {
|
|
||||||
it('returns input when cutset is empty', () => {
|
|
||||||
expect(ltrim('', 'foo')).toBe('foo');
|
|
||||||
});
|
|
||||||
it('returns empty when input is empty', () => {
|
|
||||||
expect(ltrim('foo', '')).toBe('');
|
|
||||||
});
|
|
||||||
it('can be curried', () => {
|
|
||||||
expect(ltrim('foo', '')).toBe(ltrim('foo')(''));
|
|
||||||
expect(ltrim(' ', 'foo')).toBe(ltrim(' ')('foo'));
|
|
||||||
});
|
|
||||||
it('trims cutset', () => {
|
|
||||||
fc.assert(fc.property(fc.string(), fc.string(), (cutset, str) => {
|
|
||||||
const got = ltrim(cutset, str);
|
|
||||||
|
|
||||||
if (cutset === '') {
|
|
||||||
expect(got).toBe(str);
|
|
||||||
} else if (str === '') {
|
|
||||||
expect(got).toBe('');
|
|
||||||
} else {
|
|
||||||
if (got === '') {
|
|
||||||
for (const char of str) {
|
|
||||||
expect(cutset).contains(char);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
for (const char of cutset) {
|
|
||||||
expect(startsWith(char, got)).toBe(false);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}));
|
|
||||||
});
|
|
||||||
});
|
|
||||||
});
|
});
|
||||||
31
src/index.ts
31
src/index.ts
@@ -1,4 +1,6 @@
|
|||||||
import { curry, isEmpty, tail, when } from "./utils";
|
import { curry } from "./utils";
|
||||||
|
|
||||||
|
export * from './trim';
|
||||||
|
|
||||||
function escapeRegExp(str: string) {
|
function escapeRegExp(str: string) {
|
||||||
return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
|
return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
|
||||||
@@ -8,28 +10,13 @@ export const startsWith = curry((needle: string, haystack: string) => haystack.i
|
|||||||
|
|
||||||
export const endsWith = curry((needle: string, haystack: string) => (new RegExp(`${escapeRegExp(needle)}$`)).test(haystack));
|
export const endsWith = curry((needle: string, haystack: string) => (new RegExp(`${escapeRegExp(needle)}$`)).test(haystack));
|
||||||
|
|
||||||
/**
|
export const afterFirst = curry(
|
||||||
* Trims characters from the left side of a string.
|
(separator: string, str: string) => str.substring(str.indexOf(separator) + 1, str.length),
|
||||||
*/
|
);
|
||||||
export const ltrim = curry((cutset: string, str: string) => {
|
|
||||||
const _trim = (x: string) => ltrim(cutset)(tail(x));
|
|
||||||
// const _trim = compose(ltrim(cutset), tail);
|
|
||||||
|
|
||||||
const trimmed: () => string = () => when((x: string = '') => cutset.includes(x.charAt(0)), _trim)(str);
|
export const afterLast = curry(
|
||||||
|
(separator: string, str: string) => str.substring(str.lastIndexOf(separator) + 1, str.length),
|
||||||
return isEmpty(cutset) || isEmpty(str)
|
);
|
||||||
? str
|
|
||||||
: trimmed()
|
|
||||||
});
|
|
||||||
|
|
||||||
// export const afterFirst = curry(
|
|
||||||
// /**
|
|
||||||
// * @param {String} separator
|
|
||||||
// * @param {String} str
|
|
||||||
// * @return {String}
|
|
||||||
// */
|
|
||||||
// (separator, str) => str.substring(str.indexOf(separator) + 1, str.length),
|
|
||||||
// );
|
|
||||||
|
|
||||||
// export const beforeFirst = curry(
|
// export const beforeFirst = curry(
|
||||||
// /**
|
// /**
|
||||||
|
|||||||
83
src/trim.spec.ts
Normal file
83
src/trim.spec.ts
Normal file
@@ -0,0 +1,83 @@
|
|||||||
|
import fc from "fast-check";
|
||||||
|
import { endsWith, startsWith } from "ramda";
|
||||||
|
import { describe, expect, it } from "vitest";
|
||||||
|
|
||||||
|
import { ltrim, rtrim, trim } from "./trim";
|
||||||
|
|
||||||
|
describe('trim', () => {
|
||||||
|
describe('ltrim', () => {
|
||||||
|
it('returns input when cutset is empty', () => {
|
||||||
|
expect(ltrim('', 'foo')).toBe('foo');
|
||||||
|
});
|
||||||
|
it('returns empty when input is empty', () => {
|
||||||
|
expect(ltrim('foo', '')).toBe('');
|
||||||
|
});
|
||||||
|
it('can be curried', () => {
|
||||||
|
expect(ltrim('foo', '')).toBe(ltrim('foo')(''));
|
||||||
|
expect(ltrim(' ', ' foo')).toBe(ltrim(' ')(' foo'));
|
||||||
|
});
|
||||||
|
it('trims cutset', () => {
|
||||||
|
fc.assert(fc.property(fc.string(), fc.string(), (cutset, str) => {
|
||||||
|
const got = ltrim(cutset, str);
|
||||||
|
|
||||||
|
if (cutset === '') {
|
||||||
|
expect(got).toBe(str);
|
||||||
|
} else if (str === '') {
|
||||||
|
expect(got).toBe('');
|
||||||
|
} else {
|
||||||
|
if (got === '') {
|
||||||
|
for (const char of str) {
|
||||||
|
expect(cutset).contains(char);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
for (const char of cutset) {
|
||||||
|
expect(startsWith(char, got)).toBe(false);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}));
|
||||||
|
});
|
||||||
|
});
|
||||||
|
|
||||||
|
describe('rtrim', () => {
|
||||||
|
it('returns input when cutset is empty', () => {
|
||||||
|
expect(rtrim('', 'foo')).toBe('foo');
|
||||||
|
});
|
||||||
|
it('returns empty when input is empty', () => {
|
||||||
|
expect(rtrim('foo', '')).toBe('');
|
||||||
|
});
|
||||||
|
it('can be curried', () => {
|
||||||
|
expect(rtrim('foo', '')).toBe(rtrim('foo')(''));
|
||||||
|
expect(rtrim(' ', ' foo')).toBe(rtrim(' ')(' foo'));
|
||||||
|
});
|
||||||
|
it('trims cutset', () => {
|
||||||
|
fc.assert(fc.property(fc.string(), fc.string(), (cutset, str) => {
|
||||||
|
const got = rtrim(cutset, str);
|
||||||
|
|
||||||
|
if (cutset === '') {
|
||||||
|
expect(got).toBe(str);
|
||||||
|
} else if (str === '') {
|
||||||
|
expect(got).toBe('');
|
||||||
|
} else {
|
||||||
|
if (got === '') {
|
||||||
|
for (const char of str) {
|
||||||
|
expect(cutset).contains(char);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
for (const char of cutset) {
|
||||||
|
expect(endsWith(char, got)).toBe(false);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}));
|
||||||
|
});
|
||||||
|
});
|
||||||
|
|
||||||
|
describe('trim', () => {
|
||||||
|
it("composes 'ltrim' and 'rtrim'", function() {
|
||||||
|
fc.assert(fc.property(fc.string(), fc.string(), (cutset, str) => {
|
||||||
|
expect(trim(cutset, str)).toBe(ltrim(cutset, rtrim(cutset, str)));
|
||||||
|
}));
|
||||||
|
});
|
||||||
|
})
|
||||||
|
});
|
||||||
28
src/trim.ts
Normal file
28
src/trim.ts
Normal file
@@ -0,0 +1,28 @@
|
|||||||
|
import { curry, isEmpty, tail, when } from "./utils";
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Trims characters from the left side of a string.
|
||||||
|
*/
|
||||||
|
|
||||||
|
export const ltrim = curry((cutset: string, str: string) => {
|
||||||
|
const _trim = (x: string) => ltrim(cutset)(tail(x));
|
||||||
|
// const _trim = compose(ltrim(cutset), tail);
|
||||||
|
const trimmed: () => string = () => when((x: string = '') => cutset.includes(x.charAt(0)), _trim)(str);
|
||||||
|
|
||||||
|
return isEmpty(cutset) || isEmpty(str)
|
||||||
|
? str
|
||||||
|
: trimmed();
|
||||||
|
});
|
||||||
|
|
||||||
|
export const rtrim = curry((cutset: string, str: string) => {
|
||||||
|
const _trim = (x: string) => rtrim(cutset)(x.substring(0, x.length - 1));
|
||||||
|
// const _trim = compose(rtrim(cutset), init);
|
||||||
|
const trimmed: () => string = () => when((x: string = '') => cutset.includes(x.charAt(x.length - 1)), _trim)(str);
|
||||||
|
|
||||||
|
return isEmpty(cutset) || isEmpty(str)
|
||||||
|
? str
|
||||||
|
: trimmed();
|
||||||
|
});
|
||||||
|
// const trim = curry((cutset: string, str: string) => compose(ltrim(cutset), rtrim(cutset))(str));
|
||||||
|
|
||||||
|
export const trim = curry((cutset: string, str: string) => ltrim(cutset)(rtrim(cutset, str)));
|
||||||
Reference in New Issue
Block a user