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