[英]using _.where with array underscore.js
I am new to underscore.js 我是underscore.js的新手
I have two objects TOWERS
and UNITS
我有两个对象TOWERS
和UNITS
var TOWERS = [
{
id: 1,
name: "A",
project: 1,
floors: 8
},
{
id: 2,
name: "B",
project: 1,
floors: 8
},
{
id: 3,
name: "C",
project: 1,
floors: 8
},
{
id: 4,
name: "D",
project: 1,
floors: 8
},
{
id: 5,
name: "E",
project: 1,
floors: 8
},
{
id: 6,
name: "F",
project: 2,
floors: 8
},
{
id: 7,
name: "G",
project: 2,
floors: 8
},
{
id: 8,
name: "H",
project: 2,
floors: 8
}
]
var UNITS = [
{
id: 1,
name: "101",
unittype: 1,
tower: 1,
floor: 1
},
{
id: 2,
name: "102",
unittype: 2,
tower: 1,
floor: 1
},
{
id: 3,
name: "101",
unittype: 1,
tower: 2,
floor: 1
},
{
id: 4,
name: "102",
unittype: 2,
tower: 2,
floor: 1
},
{
id: 5,
name: "101",
unittype: 3,
tower: 3,
floor: 1
},
{
id: 1,
name: "102",
unittype: 3,
tower: 8,
floor: 1
}
]
I am selecting TOWERS
id which has project:1
using: 我正在选择使用以下project:1
TOWERS
ID :
var getTowers = _.where(TOWERS, {project:1});
var getUniqueTowers = _.chain(getTowers).pluck("id").unique().compact().value();
I got [1,2,3,4,5]
我得到了[1,2,3,4,5]
Now I want to select UNITS
which tower's value is in [1,2,3,4,5]
现在,我要选择“塔”的值在[1,2,3,4,5]
UNITS
Is there any way to use _.where
like below? 有什么办法可以使用_.where
如下所示?
_.where(UNITS, {tower:[1,2,3,4,5]}
You can use .filter
with .indexOf
, like so 您可以将.filter
与.indexOf
.filter
使用,就像这样
var units = _.chain(UNITS)
.filter(function (unit) {
return _.indexOf(getUniqueTowers, unit.tower) >= 0;
})
.value()
Version without underscore 没有下划线的版本
var units = UNITS.filter(function (unit) {
return getUniqueTowers.indexOf(unit.tower) >= 0;
})
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