I'm having a problem removing empty or undefined elements from an array. I tried with this:
function clean(item) {
for (var i = 0; i < item.length; i++) {
if (item[i] === undefined || item[i] == "") {
item.splice(i, 1);
i--;
}
}
return item;
};
I don't have any result.
This is example of my array:
arr = arr.filter((entry) => { return entry.trim() != '' })
Here's a useful snippet I've written in the past.
Array.prototype.empty = function() {
for (var i = 0, s = this.length; i < s; i++) { this.pop(); }
return this;
};
Array.prototype.removeAll = function(item) {
var result = [];
for (var i = 0, j = 0, s = this.length; i < s; i++) {
if (this[i] != item) { result[j++] = this[i]; }
}
this.empty();
for (var i = 0, s = result.length; i < s;) { this.push(result[i++]); }
};Sure it may not be the best solution in the world, but it works, plus with this function you can always use it to remove other chars/specific elements from an array. Personally, I also prefer the syntax of using this, but that's just me, I personally think it's neater to write something like:
arrayVar.removeAll("");
Rather than something more like:
arrayVar = clean(ArrayVar);
All I know is that this solution works.
You can transfer the array to a temp array while not adding the empty or undefined ones
function clean(item) {
var tempArr = [];
for (var i = 0; i < item.length; i++) {
if (item[i] !== undefined && item[i] != "") {
tempArr.push(item[i]);
}
}
return tempArr;
}
let newArray = someArray.filter(Boolean)will remove all falsy things fromsomeArray.clean(["", "One", "Two", "", "Three", "", "Four"])and got the expected, clean result:["One", "Two", "Three", "Four"]- maybe you should check if there is something else that's causing you issues.