I have the following array:
etst,tset,tets,ttest,teest,tesst,testt,4est,test,dest
I want to delete the value of an input box from the array, here's what I'm trying:
var el = document.getElementById('searchInput').value; // this is "test"
var toSearchFor = eld.slice(0,10); // the array above
for(var i=0; i < toSearchFor.length; i++) {
toSearchFor[i] = toSearchFor[i].replace(/el/g, "");
}
It's simply not replacing "test" with ""
How can I do that?
You can use Array.filter (see MDN) to filter out the desired value:
var arr = 'etst,tset,tets,ttest,teest,tesst,testt,4est,test,dest'.split(',')
,val = 'test'
document.querySelector('#result')
.innerHTML = arr.filter(function (v) {return v != val});<div id="result"></div>A text field example in this jsFiddle
for global replacement of a string stored in a variable u need to create an instance of RegExp explicitly, like this:
var regex = new RegExp(el, "g");
then use it in replace function:
toSearchFor[i] = toSearchFor[i].replace(regex, "");
The problem with your code is in your regular expression: /el/g. This is trying to match the letters el, instead of whatever it's in the el variable. You could have done it using the RegExp construtor.
// ...
regexp = new RegExp(el); // No need to use 'g' here since you're looking for the whole word
toSearchFor[i] = toSearchFor[i].replace(regexp, "");
// ...
Here's another way of doing it:
var eld = ['etst','tset','tets','ttest','teest','tesst','testt','4est','test','dest'];
// var el = document.getElementById('searchInput').value;
var el = 'test';
console.log(eld);
var index = eld.indexOf(el);
if (index >= 0) {
eld[index] = '';
}
console.log(eld);
Here's the output:
["etst", "tset", "tets", "ttest", "teest", "tesst", "testt", "4est", "test", "dest"]
["etst", "tset", "tets", "ttest", "teest", "tesst", "testt", "4est", "", "dest"]
In this case, we're using Array.prototype.indexOf, which returns the first index at which a given element can be found in the array, so that we can access that element directly (if found).
I hope that helps!
eld, as you were doing in the beginning.