[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
}];
I want to extact all age values from first array and then filter extracted values of age from second array.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。
You can use pluck
to get the array of all the age
from myArray
.您可以使用
pluck
从myArray
获取所有age
的数组。 And then you can use filter
, to filter the another array based on the age.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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