48 lines
1.3 KiB
JavaScript
48 lines
1.3 KiB
JavaScript
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"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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