I have this array:
var arr1 = [{id:124,name:'qqq'},
{id:589,name:'www'},
{id:45,name:'eee'},
{id:567,name:'rrr'}]
I need to get all Id's.
var Id's = [124,589,45,567];
What's the elegant way to retrieve all id's property from object array?
Use Array#map
The
map()
method creates a new array with the results of calling a provided function on every element in this array.
var arr1 = [{ id: 124, name: 'qqq' }, { id: 589, name: 'www' }, { id: 45, name: 'eee' }, { id: 567, name: 'rrr' }]; var op = arr1.map(function(item) { return item.id; }); //Using Arrow functions `arr1.map((item) => (item.id));` console.log(op);
尝试这个
var output = arr1.map(function(obj){ return obj.id; })
var result = arr1.map(function(obj) {
return obj.id
});
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