monad-ts
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Monad-ts is a small library implements some of key monads and way to chain them in a pipe (flow) in JavaScript and TypeScript. Angular 2+ compatible.
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<div class="content" data-ice="content"><h1 data-ice="title">src/error.js</h1>
<pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import { Monad } from "./monad";
/**
* Class ErrorM - return given value or produce Error if take Error or get Error after execution of f(v).
* @extends {Monad}
*/
export class ErrorM extends Monad {
/**
* Chains the operations on a monadic values.
* @method bind
* @param {function(v: T) => Pr<U>} f - transformation function for a monad.
* @param {any} v - underlying value for a monad.
* @return {Pr<U> | Error} transformed by f() value v or Error.
*/
bind(f, v) {
if (v !== v || v === Infinity || v === -Infinity || v instanceof Error) {
return this.fail(v);
}
else {
const vL = this.just(f, v);
return (vL !== vL || vL === Infinity || vL === -Infinity || vL instanceof Error) ? this.fail(vL) : vL;
}
}
}
//Copyright (c) 2017 Alex Tranchenko. All rights reserved.
</code></pre>
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