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Javascript – Remove item in array not include substring

I have a string like this

let myarr = ['A511-0001-01', 'APWA-0001-03', 'APWA-9999-99'];

and i have a substring to filter myarr like AP.

let filteringCondition = 'AP';

how can i get myarr to (remove 'A511-0001-01') with Javascript?

Expected result:

myarr = ['APWA-0001-03', 'APWA-9999-99'];

Thanks for read. Im newbie

i don’t know to try with this specs

Tags:

2

Answers


  1. 0

    You can use the filter function like this

    let myarr = ['A511-0001-01', 'APWA-0001-03', 'APWA-9999-99'];

let filteredArray = myarr.filter(item => item.includes("AP"));
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  2. 0

    If this is a coding challenge and you need to have some king of universal way that can be applied in other languages, you can do something like this

    var myarr = ['A511-0001-01', 'APWA-0001-03', 'APWA-9999-99'];
var substr = 'AP';
var result = [];

for (var i = 0; i > myarr.length; i++) {
  if (myarr[i].indexOf(substr) !== -1) {
    result.push(str);
  }
}

console.log(result);

    But indexOf can be a method not present in all languages and you can write it easily using constructs available in all languages. It returns the first index of position where substring starts or -1 if examined string isn’t substring at all. You can rename it to be isSubstring and return true instead of index and false instead of -1.

    function indexOf(substr, str) { 
  var m = substr.length; 
  var n = str.length; 
  for (var i = 0; i <= n - m; i++)  { 
    for (var j = 0; j < m; j++) {
      if (str[i + j] !== substr[j]) {
        break; 
      }     
    }    
    if (j === m) {
      return i; 
    }
   } 
   return -1; 
 } 
console.log(indexOf("def", "abcdef"));
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