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47 lines
1.3 KiB
47 lines
1.3 KiB
"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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var isArray = Array.isArray, call = Function.prototype.call, 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, length, 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 () { |
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broken = true; |
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}; |
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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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return broken; |
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}); |
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return; |
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} |
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if (mode === "string") { |
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length = iterable.length; |
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for (i = 0; i < length; ++i) { |
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char = iterable[i]; |
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if (i + 1 < length) { |
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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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