[英]Extract key values from one Array object and filter from other objects with the extracted values with underscore javascript
var myArray = [{
"name": "John Doe",
"age": 29
}, {
"name": "Anna Smith",
"age": 24
}];
var myAnotherArray = [{
"name": "John Doe",
"age": 29
}, {
"name": "Anna Smith",
"age": 24
}, {
"name": "Peter Jones",
"age": 39
}, {
"name": "Gabby",
"age": 24
}, {
"name": "Julian",
"age": 29
}, {
"name": "George",
"age": 39
}];
我想从第一个数组中提取所有年龄值,然后从第二个数组中过滤提取的年龄值。
您可以使用pluck
从myArray
获取所有age
的数组。 然后您可以使用filter
,根据年龄过滤另一个数组。
var myArray = [{ "name": "John Doe", "age": 29 }, { "name": "Anna Smith", "age": 24 }]; var myAnotherArray = [{ "name": "John Doe", "age": 29 }, { "name": "Anna Smith", "age": 24 }, { "name": "Peter Jones", "age": 39 }, { "name": "Gabby", "age": 24 }, { "name": "Julian", "age": 29 }, { "name": "George", "age": 39 }]; var ages = _.pluck(myArray, 'age'); var filtered = _.filter(myAnotherArray, function(i, l) { return _.contains(ages, i.age); }); console.log(filtered); document.write(JSON.stringify(filtered));
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
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