Lodash _.isPositive()方法檢查給定的值是否為正,並返回相應的布爾值。
用法:
_.isPositive(value);
參數:此方法接受如上所述和以下描述的單個參數:
- value:給定值要檢查為正值。
返回值:如果給定值為“正”,則此方法返回布爾值true,否則返回false。
注意:由於它需要安裝lodash.js contrib庫,因此在常規JavaScript中將無法使用。可以使用以下命令安裝Lodash.js contrib庫:
npm install lodash-contrib
範例1:
// Defining underscore lodash variable
var _ = require('lodash-contrib');
// Checking for _.isPositive() method
console.log("The Value is Positive:" + _.isPositive(20));
輸出:
The Value is Positive:true
範例2:
// Defining underscore lodash variable
var _ = require('lodash-contrib');
// Checking for _.isPositive() method
console.log("The Value is Positive:" + _.isPositive(-1000));
console.log("The Value is Positive:" + _.isPositive("100"));
輸出:
The Value is Positive:false The Value is Positive:true
範例3:
// Defining underscore lodash variable
var _ = require('lodash-contrib');
// Checking for _.isPositive() method
console.log("The Value is Positive:" + _.isPositive(true));
console.log("The Value is Positive:" + _.isPositive([10, 20]));
輸出:
The Value is Positive:true The Value is Positive:false
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注:本文由純淨天空篩選整理自AshokJaiswal大神的英文原創作品 Lodash _.isPositive() Method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。