Lodash _.isLength() 方法
Lodash _.isLength() 方法检查给定值是否是类似数组的长度并返回相应的布尔值。
句法:
_.isLength( value )
参数:此方法接受上面提到的单个参数,如下所述:
- value:此参数保存需要检查类似数组长度的值。
返回值:此方法返回一个布尔值(如果给定值是类似数组的长度,则返回 true,否则返回 false)。
示例 1:
Javascript
// Defining Lodash variable
const _ = require('lodash');
// Checking for Length
console.log("The Value is Length : "
+ _.isLength(100));
Javascript
// Defining Lodash variable
const _ = require('lodash');
// Checking for Length
console.log("The Value is Length : "
+ _.isLength(Infinity));
Javascript
// Defining Lodash variable
const _ = require('lodash');
// Checking for Length
console.log("The Value is Length : "
+ _.isLength("len"));
Javascript
// Defining Lodash variable
const _ = require('lodash');
// Checking for Length
console.log("The Value is Length : "
+ _.isLength(Number.MAX_VALUE));
输出:
The Value is Length : true
示例 2:对于 Infinity,它返回 false。
Javascript
// Defining Lodash variable
const _ = require('lodash');
// Checking for Length
console.log("The Value is Length : "
+ _.isLength(Infinity));
输出:
The Value is Length : false
示例 3:对于字符串,它返回 false。
Javascript
// Defining Lodash variable
const _ = require('lodash');
// Checking for Length
console.log("The Value is Length : "
+ _.isLength("len"));
输出:
The Value is Length : false
示例 4:
Javascript
// Defining Lodash variable
const _ = require('lodash');
// Checking for Length
console.log("The Value is Length : "
+ _.isLength(Number.MAX_VALUE));
输出:
The Value is Length : true