Lodash _.isNegative()方法檢查給定值是否為負值,並返回相應的布爾值。
用法:
_.isNegative( value );
參數:該方法采用上述和以下描述的單個參數:
- value:給定值要檢查負值。
返回值:如果給定值為Negative,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npm install lodash-contrib來安裝Lodash.js contrib庫。
範例1:
Javascript
// Defining lodash contrib variable
var _ = require('lodash-contrib');
// Checking for _.isNegative() method
console.log("The Value is Negative:" + _.isNegative(-500));
console.log("The Value is Negative:" + _.isNegative(500));
console.log("The Value is Negative:" + _.isNegative('G'));
輸出:
The Value is Negative:true The Value is Negative:false The Value is Negative:false
範例2:
Javascript
// Defining lodash contrib variable
var _ = require('lodash-contrib');
// Checking for _.isNegative() method
console.log("The Value is Negative:" + _.isNegative(-10.5));
console.log("The Value is Negative:" + _.isNegative(10.5));
console.log("The Value is Negative:" + _.isNegative({}));
輸出:
The Value is Negative:true The Value is Negative:false The Value is Negative:false
相關用法
- underscore.js _.isNegative()用法及代碼示例
- Lodash _.method()用法及代碼示例
- Lodash _.sneq()用法及代碼示例
- Lodash _.toQuery()用法及代碼示例
- Lodash _.uniqWith()用法及代碼示例
- Lodash _.xorWith()用法及代碼示例
- Lodash _.head()用法及代碼示例
- Lodash _.remove()用法及代碼示例
- Lodash _.pullAt()用法及代碼示例
- Lodash _.pullAll()用法及代碼示例
- Lodash _.pull()用法及代碼示例
- Lodash _.nth()用法及代碼示例
- Lodash _.takeRight()用法及代碼示例
- Lodash _.take()用法及代碼示例
- Lodash _.sortedLastIndex()用法及代碼示例
- Lodash _.fromPairs()用法及代碼示例
- Lodash _.differenceWith()用法及代碼示例
- Lodash _.castArray()用法及代碼示例
- Lodash _.cloneDeep()用法及代碼示例
- Lodash _.clone()用法及代碼示例
- Lodash _.sampleSize()用法及代碼示例
- Lodash _.find()用法及代碼示例
- Lodash _.zipWith()用法及代碼示例
- Lodash _.zipObject()用法及代碼示例
注:本文由純淨天空篩選整理自AshokJaiswal大神的英文原創作品 Lodash _.isNegative() 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。