如何在lodash中删除数组中的对象

I have an array of objects and I need to delete few of the objects based on conditions. How can I achieve it using lodash map function? Ex:

我有一个对象数组，我需要根据条件删除一些对象。如何使用lodash map函数实现?例:

[{a: 1}, {a: 0}, {a: 9}, {a: -1}, {a: 'string'}, {a: 5}]

I need to delete

我需要删除

{a: 0}, {a: -1}, {a: 'string'}

How can I achieve it?

我怎样才能做到呢?

4 个解决方案

#1

You can use lodash's remove function to achieve this. It transforms the array in place and return the elements that have been removed

您可以使用lodash的删除功能来实现这一点。它将数组转换到适当的位置并返回已删除的元素

var array = [{a: 1}, {a: 0}, {a: 9}, {a: 5}];
var removed = _.remove(array, item => item.a === 0);

console.log(array);
// => [{a: 1}, {a: 9}, {a: 5}]

console.log(removed);
// => [{a: 0}]

#2

ES6

ES6

const arr = [{a: 1}, {a: 0}, {a: 9}, {a: 5}];

const newArr = _.filter(arr, ({a}) => a !== 0);

ES5

ES5

var arr = [{a: 1}, {a: 0}, {a: 9}, {a: 5}];

var newArr = _.filter(arr, function(item) { return item.a !== 0 });

https://lodash.com/docs/4.17.4#filter

https://lodash.com/docs/4.17.4过滤器

#3

Other then _.remove or _.filter you can also use reject()

其他然后_。删除或_。也可以使用reject()

var array = [{a: 1}, {a: 0}, {a: 9}, {a: 5}];
var result = _.reject(array , ({a}) => a===0 });

console.log(result);//[{a: 1}, {a: 9}, {a: 5}]

https://jsfiddle.net/7z5n5ure/

#4

-1

use this pass arr, key on which you want condition to apply and value is value of key you want to check.

使用此pass arr，您希望条件应用的关键字和值是您想要检查的键值。

function removeElem(arr,key,value){
    return arr.filter(elem=>elem[key]===value)
}

#1