values()函数_isfinite函数「建议收藏」

_.isFinite(value)

_.isFinite(3);
// => true
 
_.isFinite(Number.MIN_VALUE);
// => true
 
_.isFinite(Infinity);
// => false
 
_.isFinite('3');
// => false

/**
 * lodash (Custom Build) <https://lodash.com/>
 * Build: `lodash modularize exports="npm" -o ./`
 * Copyright jQuery Foundation and other contributors <https://jquery.org/>
 * Released under MIT license <https://lodash.com/license>
 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 */

/** Detect free variable `global` from Node.js. */
//探测nodejs环境下global对象
var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;

/** Detect free variable `self`. */
//探测self对象
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

/** Used as a reference to the global object. */
//返回全局对象的引用
var root = freeGlobal || freeSelf || Function('return this')();

/* Built-in method references for those with the same name as other `lodash` methods. */
//使用原生的全局方法isFinite()
var nativeIsFinite = root.isFinite;

/**
 * Checks if `value` is a finite primitive number.
 *
 * **Note:** This method is based on
 * [`Number.isFinite`](https://mdn.io/Number/isFinite).
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
 * @example
 *
 * _.isFinite(3);
 * // => true
 *
 * _.isFinite(Number.MIN_VALUE);
 * // => true
 *
 * _.isFinite(Infinity);
 * // => false
 *
 * _.isFinite('3');
 * // => false
 */
function isFinite(value) {//使用原生提供的全局方法isFinite()判断
  return typeof value == 'number' && nativeIsFinite(value);
}

module.exports = isFinite;