JavaScript split method: A handy function for breaking up strings

Question

JavaScript split method: A handy function for breaking up strings

Is there a way to convert the file extension from .doc to .txt?
When I try alert(myvar), it shows an empty alert.

enter code here
 <form>
 <input type="file" id="f1">
<button onclick="myFunction(f1.value)">Try it</button>
 </form>
  <script>
    function myFunction(a) {
      var mystr = a;
      var myarr = mystr.split(".doc");
      var ex= ".txt";
      var myvar = myarr + ex;
      alert(myvar);
       }
</script>

javascript ajax

Answer 1

Answer №1

Try using the str.replace method

newStr = myString.replace(".doc", ".txt")

Answer 2

Try using the str.replace method

newStr = myString.replace(".doc", ".txt")

Answer 3

Answer №2

When you have an array and use the split function, it splits the string based on the specified delimiter.

<script>
    function modifyString(str) {
      var originalStr = str;
      var strArr = originalStr.split(".doc");
      var extension = ".txt";
      var modifiedStr = strArr[0] + extension;
      alert(modifiedStr);
       }
</script>

Answer 4

When you have an array and use the split function, it splits the string based on the specified delimiter.

<script>
    function modifyString(str) {
      var originalStr = str;
      var strArr = originalStr.split(".doc");
      var extension = ".txt";
      var modifiedStr = strArr[0] + extension;
      alert(modifiedStr);
       }
</script>

Answer 5

Answer №3

Here are the steps you can take

<input type="file" id="f2">
<input type="button" value="try it" onclick="check(f2.value)">

function check(b){
    var file = b;
file = file.split(".");
file = file[0]+".txt"; //any extension of your choice
 alert(file);   
}

Answer 6

Here are the steps you can take

<input type="file" id="f2">
<input type="button" value="try it" onclick="check(f2.value)">

function check(b){
    var file = b;
file = file.split(".");
file = file[0]+".txt"; //any extension of your choice
 alert(file);   
}

Answer 7

Answer №4

To solve the issue, please refer to the code snippet provided below. Additionally, you can check out the CODEPEN DEMO for a live example.

HTML:
<input type="file" id="f1">
<input type="button" value="myfun" onclick="myFunction(f1.value)">

JavaScript:

window.myFunction = function(input) {
 var file = input;
 file = file.split(".");
 file = file[0] + ".txt";
 alert(file);
}

}

Answer 8

To solve the issue, please refer to the code snippet provided below. Additionally, you can check out the CODEPEN DEMO for a live example.

HTML:
<input type="file" id="f1">
<input type="button" value="myfun" onclick="myFunction(f1.value)">

JavaScript:

window.myFunction = function(input) {
 var file = input;
 file = file.split(".");
 file = file[0] + ".txt";
 alert(file);
}

}

Answer 9

Answer №5

function updateExtension(file){
    if(file.substring(file.length - 3,file.length) == "doc"){
        var file = file.substring(0,file.length - 3);
        file += "txt";
        return file;
    }
    else{
        return 'invalid extension';
    }

}

Answer 10

function updateExtension(file){
    if(file.substring(file.length - 3,file.length) == "doc"){
        var file = file.substring(0,file.length - 3);
        file += "txt";
        return file;
    }
    else{
        return 'invalid extension';
    }

}

Answer 11

Answer №6

 <script>
    function generateTxtFile(a) {
      var originalString = a;
      var stringArray = originalString.split(".doc")[0];
      var extension = ".txt";
      var finalString = stringArray + extension;
      alert(finalString);
       }
</script>

Answer 12

 <script>
    function generateTxtFile(a) {
      var originalString = a;
      var stringArray = originalString.split(".doc")[0];
      var extension = ".txt";
      var finalString = stringArray + extension;
      alert(finalString);
       }
</script>

Answer 13

Answer №7

Kindly test out the code snippet provided below and don't forget to check out the LIVE EXAMPLE

HTML:
<input type="file" id="f1">
<input type="button" value="myfun" onclick="myFunction(f1.value)">

JavaScript:

window.myFunction = function(fileName) {
    var newFileName = fileName.substr(0, fileName.lastIndexOf("."));
    newFileName = newFileName+".txt"; 
     alert(newFileName);   
}

Answer 14

Kindly test out the code snippet provided below and don't forget to check out the LIVE EXAMPLE

HTML:
<input type="file" id="f1">
<input type="button" value="myfun" onclick="myFunction(f1.value)">

JavaScript:

window.myFunction = function(fileName) {
    var newFileName = fileName.substr(0, fileName.lastIndexOf("."));
    newFileName = newFileName+".txt"; 
     alert(newFileName);   
}

Answer 15

Answer №8

When deciding between using the split function or the replace method in jQuery, it's important to consider the specific task at hand. While both options can manipulate strings, the split function is better suited for dividing a string into an array based on a specified delimiter, while the replace method is ideal for replacing specific parts of a string with new values.

var str = "John Doe";
var res = str.replace("Doe", "Smith");

After running this example, the output will be:

John Smith

Answer 16

When deciding between using the split function or the replace method in jQuery, it's important to consider the specific task at hand. While both options can manipulate strings, the split function is better suited for dividing a string into an array based on a specified delimiter, while the replace method is ideal for replacing specific parts of a string with new values.

var str = "John Doe";
var res = str.replace("Doe", "Smith");

After running this example, the output will be:

John Smith

JavaScript split method: A handy function for breaking up strings

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

Answer №7

Answer №8

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