mirror of https://github.com/jkjoy/sunpeiwen.git
38 lines
1.1 KiB
JavaScript
38 lines
1.1 KiB
JavaScript
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var Symbol = require('./_Symbol'),
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arrayMap = require('./_arrayMap'),
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isArray = require('./isArray'),
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isSymbol = require('./isSymbol');
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/** Used as references for various `Number` constants. */
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var INFINITY = 1 / 0;
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/** Used to convert symbols to primitives and strings. */
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var symbolProto = Symbol ? Symbol.prototype : undefined,
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symbolToString = symbolProto ? symbolProto.toString : undefined;
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/**
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* The base implementation of `_.toString` which doesn't convert nullish
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* values to empty strings.
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*
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* @private
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* @param {*} value The value to process.
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* @returns {string} Returns the string.
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*/
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function baseToString(value) {
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// Exit early for strings to avoid a performance hit in some environments.
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if (typeof value == 'string') {
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return value;
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}
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if (isArray(value)) {
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// Recursively convert values (susceptible to call stack limits).
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return arrayMap(value, baseToString) + '';
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}
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if (isSymbol(value)) {
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return symbolToString ? symbolToString.call(value) : '';
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}
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var result = (value + '');
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return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
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}
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module.exports = baseToString;
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