https://github.com/WebReflection/caller-of

The tiniest yet most powerful JS utility ever :D
https://github.com/WebReflection/caller-of

Last synced: 3 days ago
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The tiniest yet most powerful JS utility ever :D

• Host: GitHub
• URL: https://github.com/WebReflection/caller-of
• Owner: WebReflection
• License: wtfpl
• Created: 2013-02-15T21:18:33.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2015-04-01T23:54:41.000Z (over 9 years ago)
• Last Synced: 2024-09-21T12:27:58.865Z (about 2 months ago)
• Language: HTML
• Homepage:
• Size: 363 KB
• Stars: 104
• Watchers: 4
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

        
caller-of

=========

The tiniest yet most powerful JS utility ever :D

```JavaScript

/** WTFPL Style License */

function callerOf(c) {return c.call.bind(c)}

```

### What Does Above Code Do

Here is what we usually do

```JavaScript

object.hasOwnProperty(key)

```

Here is what `callerOf` create

```JavaScript

hasOwnProperty(object, key)

```

so we can borrow any method at any time and reuse it in a minifier friendly way.

```JavaScript

var bind = callerOf(Function.bind);

// easy log

var log = bind(console.log, console);

log('it works');

// common borrowed methods

var

  has = callerOf({}.hasOwnProperty),

  whoIs = callerOf({}.toString),

  forEach = callerOf([].forEach),

  slice = callerOf([].slice);

has({a:1}, "a"); // true

has({a:1}, "toString"); // false

whoIs([]);    // "[object Array]"

whoIs(false); // "[object Boolean]"

slice(document.querySelectorAll("*")); // array

(function (obj){

  var args = slice(arguments, 1);

}());

forEach(document.getElementsByTagName("body"), log);

```

### Compatibility

Every JavaScript engine I know, included IE.

For *node.js* simply `npm install caller-of` then `var callerOf = require('caller-of')`

### What If No Function.prototype.bind

You can use this tiny yet working polyfill ^_^

```JavaScript

// 139 bytes gzipped

/*! (C) WebReflection, Mit Style License */

(function (P) {

  'use strict';

  if (!P.bind) {

    P.bind = function (s) {

      var

        c = this,

        l = [].slice,

        a = l.call(arguments, 1);

      return function bind() {

        return c.apply(s, a.concat(l.call(arguments)));

      };

    };

  }

}(Function.prototype));

```