| 'use strict'; |
| |
| var isArguments = require('es5-ext/function/is-arguments') |
| , callable = require('es5-ext/object/valid-callable') |
| , isString = require('es5-ext/string/is-string') |
| , get = require('./get') |
| |
| , isArray = Array.isArray, call = Function.prototype.call |
| , some = Array.prototype.some; |
| |
| module.exports = function (iterable, cb/*, thisArg*/) { |
| var mode, thisArg = arguments[2], result, doBreak, broken, i, l, char, code; |
| if (isArray(iterable) || isArguments(iterable)) mode = 'array'; |
| else if (isString(iterable)) mode = 'string'; |
| else iterable = get(iterable); |
| |
| callable(cb); |
| doBreak = function () { broken = true; }; |
| if (mode === 'array') { |
| some.call(iterable, function (value) { |
| call.call(cb, thisArg, value, doBreak); |
| if (broken) return true; |
| }); |
| return; |
| } |
| if (mode === 'string') { |
| l = iterable.length; |
| for (i = 0; i < l; ++i) { |
| char = iterable[i]; |
| if ((i + 1) < l) { |
| code = char.charCodeAt(0); |
| if ((code >= 0xD800) && (code <= 0xDBFF)) char += iterable[++i]; |
| } |
| call.call(cb, thisArg, char, doBreak); |
| if (broken) break; |
| } |
| return; |
| } |
| result = iterable.next(); |
| |
| while (!result.done) { |
| call.call(cb, thisArg, result.value, doBreak); |
| if (broken) return; |
| result = iterable.next(); |
| } |
| }; |
