[英]custom array.sort function with several criteria incl. boolean
I have an array of objects that i would like to order by several properties. 我有一个对象数组,我想通过几个属性来订购。
Im going to showcase a single element of the array 我将展示数组的单个元素
var ele = {
id: INT, various,
priority: INT 1 - 10,
shooterid: INT various,
targetid: INT various,
flight: BOOL
}
i would like to order the array according to some criteria and i can do the sort by priority, shooter and target by using 我想根据一些标准订购阵列,我可以通过使用优先级,射手和目标进行排序
if (a.priority != b-priority){
return a-priority - b-priority;
else if a.shooterid != b.shooterid){
return a.shooterid - b. shooterid
}
else return a.targetid - b.targetid
However, i also want to sort by flight and i would like to all elements with flight = true
to be sorted LAST in addition to the above sort. 但是,我也希望按航班排序, 除了上述排序之外 ,我还希望所有具有
flight = true
元素最后排序。
I tried if (a.flight){return -1/0/1}
a the very top of the above if/self (adding else to the formerly if) but it didnt work... 我试过
if (a.flight){return -1/0/1}
a上面的最上面的if / self(除了以前的if之外),但它没有用...
How can i extend the sort to include for the BOOL prop ? 我如何扩展排序以包括BOOL道具?
You could combine all sort criteria with logical or ||
您可以将所有排序条件与逻辑或
||
组合在一起 , even the boolean values. ,甚至是布尔值。
var data = [{ id: 0, flight: true, priority: 1, shooterid: 2, targetid: 1 }, { id: 1, flight: true, priority: 2, shooterid: 2, targetid: 3 }, { id: 2, flight: false, priority: 1, shooterid: 1, targetid: 2 }, { id: 3, flight: false, priority: 2, shooterid: 1, targetid: 1 }, { id: 4, flight: true, priority: 1, shooterid: 1, targetid: 2 }]; data.sort(function (a, b) { return ( a.flight - b.flight || a.priority - b.priority || a.shooterid - b.shooterid || a.targetid - b.targetid ); }); console.log(data);
.as-console-wrapper { max-height: 100% !important; top: 0; }
The first if
should be: 第一
if
应该是:
if (a.flight != b.flight)
return a.flight - b.flight;
In the subtraction, boolean true
will be treated as 1
and false
as 0
. 在减法中,布尔值
true
将被视为1
, false
将被视为0
。 That means that the false
ones will sort before the true
ones, as you say you want. 这意味着
false
那些将在true
那些之前排序,正如你所说的那样。
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