Source: \toString.js
import arrayMap from './.internal/arrayMap.js'
import isSymbol from './isSymbol.js'
/** Used as references for various `Number` constants. */
const INFINITY = 1 / 0
/** Used to convert symbols to primitives and strings. */
const symbolProto = Symbol ? Symbol.prototype : undefined
const symbolToString = symbolProto ? symbolProto.toString : undefined
/**
* Converts `value` to a string. An empty string is returned for `null`
* and `undefined` values. The sign of `-0` is preserved.
*
* @since 4.0.0
* @category Lang
* @param {*} value The value to convert.
* @returns {string} Returns the converted string.
* @example
*
* toString(null)
* // => ''
*
* toString(-0)
* // => '-0'
*
* toString([1, 2, 3])
* // => '1,2,3'
*/
function toString(value) {
if (value == null) {
return ''
}
// Exit early for strings to avoid a performance hit in some environments.
if (typeof value == 'string') {
return value
}
if (Array.isArray(value)) {
// Recursively convert values (susceptible to call stack limits).
return `${ arrayMap(value, (other) => other == null ? other : toString(other)) }`
}
if (isSymbol(value)) {
return symbolToString ? symbolToString.call(value) : ''
}
const result = `${ value }`
return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result
}
export default toString