remove last n letters from in javascript

Question

How can I check if one array contains arr in JavaScript? Usually, I would expect a subString method, but there doesn't seem to be one. What is a reasonable way to check for this?

arr=["aaaaaa-2","bbbbbbbb-2","zzzz-3","ffddssaa-1","sssssss-3","areyo-1"]

i trying to remove last two characters from list, i tried with below code but no use of these, can any one suggest me

arr.substring(0, -2)

I need array like

["aaaaaa","bbbbbbbb","zzzz","ffddssaa","sssssss","areyo"]

arr.substring(0, -2) this will work, just modify arr[index].substring(0, -2) — Sinto, May 12 '16 at 10:51
Possible duplicate of [Javascript chop/slice/trim off last character in string](http://stackoverflow.com/questions/952924/javascript-chop-slice-trim-off-last-character-in-string) — Ahmad Sharif, May 12 '16 at 10:52

score 3 · Answer 1 · answered May 12 '16 at 10:51

3

Just try with:

arr.map(function(v){
  return v.substr(0, v.length - 2);
});

answered May 12 '16 at 10:51

hsz

143,040
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score 1 · Answer 2 · answered May 12 '16 at 10:51

Iterate over the elements and apply the substring() method, for that use map()

var arr = ["aaaaaa-2", "bbbbbbbb-2",, "zzzz-3", "ffddssaa-1", "sssssss-3", "areyo-1"];

var res = arr.map(function(v) {
  return v.substring(0, v.length-2);
});

console.log(res);

score 0 · Answer 3 · answered May 12 '16 at 10:51

0

var arr=["aaaaaa-2","bbbbbbbb-2","zzzz-3","ffddssaa-1","sssssss-3","areyo-1"];

for(var i in arr){
  consile.log(arr[i].substr(0,arr[i].lastIndexOf("-")); //here is your value
}

answered May 12 '16 at 10:51

Anupam Singh

1,148
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score 0 · Answer 4 · answered May 12 '16 at 10:51

0

use map method of array.

arr = arr.map(function(item){return item.slice(0, item.length-2)});

answered May 12 '16 at 10:51

CrazyMax

131
1
5

score 0 · Answer 5 · answered May 12 '16 at 10:51

0

for(var i=0;i<arr.length;i++) {
    arr[i] = arr[i].substring(0, arr[i].length-2);
}

answered May 12 '16 at 10:51

take

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score 0 · Answer 6 · answered May 12 '16 at 10:52

0

Easiest thing would be to use map function

var arr=["aaaaaa-2","bbbbbbbb-2","zzzz-3","ffddssaa-1","sssssss-3","areyo-1"];
console.log(arr.map(function (e){
    return e.slice(0, -2);
}));

answered May 12 '16 at 10:52

Wild Widow

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score 0 · Answer 7 · answered May 12 '16 at 10:53

0

first of all for your information substring method work on string not on array and here arr is an array the code should be like:-

for(var i = 0;i<arr.length;i++)
   {
     arr[i].substring(0, arr[i].length-2);
   }

answered May 12 '16 at 10:53

Rahul

229
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remove last n letters from in javascript

7 Answers7