Match string case sensitive value with array

Question

Here is my code!!! I have one input field And One of the array I'm matching Input field entered value with arrray's list. Prob : Unable to match capital value with array's list. e.g if user enter one10 value so this one should be match or if user enter ONE10 in capital letter then this value should be match too.

function myFunctiontwo(){
  var good = [
      "one10",
      "two10",
      "three10"
  ];
  var a = document.getElementById("code").value.split(' ');


  var foundPresent = a.some(elem => good.indexOf(elem) > -1);
  if(foundPresent === true){
    alert("correct");
      
  }else {
    alert("wrong");
      
  }
}

user_14747039 · Answer

You can use the toLowerCase() method here. Assuming all your elements in good are lowercase you can just do elem.toLowerCase()

var foundPresent = a.some(elem => good.indexOf(elem.toLowerCase()) > -1);

When not you also should convert the array elements toLowerCase()

good = good.map(x => x.toLowerCase());

In the snippet below I added the element "FOur20" to the array.

As you can see four20 will give you the message correct

function myFunctiontwo(){
  var good = [
      "one10",
      "two10",
      "three10",
      "FOur20"
  ];

  good = good.map(x => x.toLowerCase());
  console.log(good);
  
  var a = document.getElementById("code").value.split(' ');


  var foundPresent = a.some(elem => good.indexOf(elem.toLowerCase()) > -1);
  if(foundPresent === true){
    alert("correct");
      
  }else {
    alert("wrong");
      
  }
}

user_7494218 · Answer

Let's first make sure the good array is all lowercase:

 good = good.map(word => word.toLowerCase());

Then, you can always convert to lowercase and check if it exists in the good array

  var foundPresent = a.some(elem => good.contains(elem.toLowerCase()));
  if(foundPresent === true) {
     alert("correct");    
  }
  else {
     alert("wrong");
  }

Match string case sensitive value with array

2 Answers