[英]How to remove set of item values of array from another array in Javascript
var myFind_collections =[3,6,10,234,235,236,237,238,239,240,241,244,245,246,247,248,248,249,250];
var pgRangeCollection = [234,235,236,237,238,239,240,241,244,245,246,247,248,248,249,250];
for(v=0;v<=pgRangeCollection.length;v++){
var pgMatch = pgRangeCollection[v];
clear_pg_range(pgMatch);
}
function clear_pg_range(pgMatch){
//for(d=0;d<=myFind_collections.length-1;d++){
for(d=0;d<=myFind_collections.length-1;d++){
var docFound = parseInt(myFind_collections[d]);
if(pgMatch===docFound){
myFind_collections.splice(myFind_collections[d],1);
alert(docFound + " was removed");
}
}
}
alert(myFind_collections.length);
在上面的代碼中,我想刪除myFind_collections中等於pgRangeCollection的每個項目
我希望輸出為(3,6,10)但我得到的輸出為(248,249,250)
我不知道我在哪里犯錯,有人可以為此建議解決方案,
提前致謝
使用Array.filter
var myFind_collections =[3,6,10,234,235,236,237,238,239,240,241,244,245,246,247,248,248,249,250];
var pgRangeCollection = [234,235,236,237,238,239,240,241,244,245,246,247,248,248,249,250];
var filtered = myFind_collections.filter(
function(a){return pgRangeCollection.indexOf(a) < 0}
); // => [ 3, 6, 10 ]
答案應該使用KooiInc已經提出的.filter方法,但是由於IE是必需條件,因此我將使用Lodash或Underscore的差分方法:
_.difference(myFind_collections, pgRangeCollection) // [3,6,10]
只需通過CDN包含它即可: http ://cdnjs.com/libraries/lodash.js/
或者如果您已經有了jQuery:
$(myFind_collections).not(pgRangeCollection).get() // [3,6,10]
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