📜  Collect.js whereNotNull 方法

📅  最后修改于: 2022-05-13 01:56:28.287000             🧑  作者: Mango

Collect.js whereNotNull 方法

whereNotNull()方法用于返回不包含任何空值的集合。简单来说,就是过滤不为空的值。

安装:

  • 在 NodeJs 中:
    npm install collect.js
  • collect.js 的 CDN

句法:

whereNotNull(key if any)

参数:它获取对象中元素的键。

返回值:返回对象。

示例 1:

Javascript
// Importing the collect.js module.
const collect = require('collect.js');
  
let obj1 = [{ "a": null }, { "a": 3 }, 
    { "b": null }, { "b": 33 }, { "a": null }];
  
// Making a collection
let collection = collect(obj1);
  
// Filtering the null values;
let collectionFilter = collection.whereNotNull("a");
  
// Printing the original collection
console.log("Original collection is: ", collection.all())
console.log("filter only key \"a\" for null values")
console.log("Filtered collection is: ", 
        collectionFilter.all());


Javascript
// Importing the collect.js module.
const collect = require('collect.js');
let obj1 = [1, 2, null, null, 5];
  
// Making a collection
let collection = collect(obj1);
  
// Filtering the null values;
let collectionFilter = collection.whereNotNull();
console.log("Original collection is: ",
            collection.all())
  
console.log("Filtered collection is: ", 
            collectionFilter.all());


输出:

示例 2:

Javascript

// Importing the collect.js module.
const collect = require('collect.js');
let obj1 = [1, 2, null, null, 5];
  
// Making a collection
let collection = collect(obj1);
  
// Filtering the null values;
let collectionFilter = collection.whereNotNull();
console.log("Original collection is: ",
            collection.all())
  
console.log("Filtered collection is: ", 
            collectionFilter.all());

输出:

参考: https://collect.js.org/api/whereNotNull.html