Confirming the presence of values following hyphens in a string

Question

Confirming the presence of values following hyphens in a string

Can you help me with this?

I want to create a function that checks if the string below (represented by var x) has values after each of the 7 dashes and returns valid or invalid

var x = 4-D-5240-P43-120-08A2-8123-0000 (valid)

Here are some examples where x is invalid:

var x = 4--5220--120-08C2-8072- (invalid)
var x = 4--5217-P41-120--8072- (invalid) 
var x = --5217-P41---8072- (invalid)

I attempted the following, but it fails when there is no value:

function test() {

var str1 = "4-D-5240-P43-120-08A2-8123-0000" //works
    str1 = str.split('-')

var str = "4--5240-P43--08A2-8123-0000" //error here <--
    str = str.split('-')

if (str.length < 8) { alert('validation failed') }
else { alert('validation passed!') }

}

javascript string

Answer 1

Answer №1

Have you thought about using Regular Expressions (Regex)?

const
regexPattern = /(([\d\w]+)-([\d\w]+)-([\d\w]+)-([\d\w]+)-([\d\w]+)-([\d\w]+)-([\d\w]+)-([\d\w]+))/,

stringsToTest = ["4-D-5240-P43-120-08A2-8123-0000", "4--5217-P41-120--8072-", "--5217-P41---8072-", "4--5220--120-08C2-8072-"];

stringsToTest.forEach((str) => {

   console.log(`${str} is valid: ${ regexPattern.test(str) }`);

});

Answer 2

Have you thought about using Regular Expressions (Regex)?

const
regexPattern = /(([\d\w]+)-([\d\w]+)-([\d\w]+)-([\d\w]+)-([\d\w]+)-([\d\w]+)-([\d\w]+)-([\d\w]+))/,

stringsToTest = ["4-D-5240-P43-120-08A2-8123-0000", "4--5217-P41-120--8072-", "--5217-P41---8072-", "4--5220--120-08C2-8072-"];

stringsToTest.forEach((str) => {

   console.log(`${str} is valid: ${ regexPattern.test(str) }`);

});

Answer 3

Answer №2

If you're looking to utilize regex for a similar task, take a look at this implementation.

   var pattern = /[0-9|a-z][-][0-9|a-z]/g;
   var sample1 = "4--5220--120-08C2-8072-";
   var sample2 = "4-D-5240-P43-120-08A2-8123-0000"


  if(sample1.match(pattern).length == 4) {
  alert("match");
  }
  else
  {
  alert("no match");
  }
  if(sample2.match(pattern).length == 4) {
  alert("match");
  }
  else
  {
  alert("no match");
  }

Answer 4

If you're looking to utilize regex for a similar task, take a look at this implementation.

   var pattern = /[0-9|a-z][-][0-9|a-z]/g;
   var sample1 = "4--5220--120-08C2-8072-";
   var sample2 = "4-D-5240-P43-120-08A2-8123-0000"


  if(sample1.match(pattern).length == 4) {
  alert("match");
  }
  else
  {
  alert("no match");
  }
  if(sample2.match(pattern).length == 4) {
  alert("match");
  }
  else
  {
  alert("no match");
  }

Answer 5

Answer №3

To start off, the first step is to declare the code and set the data-target to "-".

var id= "100-2-8-8-8-8-8ssss80-0";
var arr = id.split("-");

The next step involves checking if the code is valid or not. If there are less or more than 7 dashes, the output will be considered invalid. Otherwise, a function will run to verify if the dashes are in the correct positions.

function countDash(){
 if (arr.length ==8){
        result();
    }
    else{
        alert("invalid");
    }
}

Once we've split our function, it's important to check if every value in the array has a value assigned to it. If a dash is located at the beginning, end, or as multiple characters, an empty value will be returned.

function check(value){
return value.length<1;
}

We then utilize the previously declared function to examine each value within the array. If the array turns out empty, the output will be deemed invalid; otherwise, the code will be considered valid.

function result(){
    if(arr.some(check)){
        alert("invalid");
    }
    else{
        alert("valid");
    }
}

Lastly, we need to execute the initial function.

window.onload= countDash ;

I hope this explanation clarified the process for you. If there are any further steps to take, please feel free to inform me.

Answer 6

To start off, the first step is to declare the code and set the data-target to "-".

var id= "100-2-8-8-8-8-8ssss80-0";
var arr = id.split("-");

The next step involves checking if the code is valid or not. If there are less or more than 7 dashes, the output will be considered invalid. Otherwise, a function will run to verify if the dashes are in the correct positions.

function countDash(){
 if (arr.length ==8){
        result();
    }
    else{
        alert("invalid");
    }
}

Once we've split our function, it's important to check if every value in the array has a value assigned to it. If a dash is located at the beginning, end, or as multiple characters, an empty value will be returned.

function check(value){
return value.length<1;
}

We then utilize the previously declared function to examine each value within the array. If the array turns out empty, the output will be deemed invalid; otherwise, the code will be considered valid.

function result(){
    if(arr.some(check)){
        alert("invalid");
    }
    else{
        alert("valid");
    }
}

Lastly, we need to execute the initial function.

window.onload= countDash ;

I hope this explanation clarified the process for you. If there are any further steps to take, please feel free to inform me.

Confirming the presence of values following hyphens in a string

Answer №1

Answer №2

Answer №3

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