Separate a string into an array containing pairs of numbers

Question

Separate a string into an array containing pairs of numbers

I'm currently working on splitting a hexadecimal string into an array of paired numbers. Here is the code snippet I have so far:

function getRGB(hexVal) {

    var substrHexVal = hexVal.substring(1,hexVal.length);

    var splitHexVal = substrHexVal.split("");

    return splitHexVal;

}

var result = getRGB("#00FF00");

result;

The current output looks like this:

["0", "0", "F", "F", "0", "0"]

However, I am aiming to achieve this output:

["00", "FF", "00"]

Although my intention might be clear, I would appreciate some guidance on how to proceed.

javascript arrays

Answer 1

Answer №1

Discover the strength within the practical realm, Luke

b="#d1ffee"
"#d1ffee"

[2,4,6].map(function(o) {return b.slice(o,o+2)})
["d1", "ff", "ee"]

Answer 2

Discover the strength within the practical realm, Luke

b="#d1ffee"
"#d1ffee"

[2,4,6].map(function(o) {return b.slice(o,o+2)})
["d1", "ff", "ee"]

Answer 3

Answer №2

function extractRGB(hexValue) {

    return hexValue.toUpperCase().match(/[0-9A-F]{2}/g);

}

To obtain the hexadecimal pairs from a string, convert it to uppercase and use a basic regular expression for extraction. Although converting to uppercase is not essential, it ensures consistency in the extracted pairs. You can also opt to convert all alpha characters to lowercase instead (changing "A-F" to "a-f" in the regex):

function extractRGB(hexValue) {

    return hexValue.toLowerCase().match(/[0-9a-f]{2}/g);

}

If case sensitivity isn't a concern, you can make the regex case insensitive by adding the "i" modifier:

function extractRGB(hexValue) {

    return hexValue.match(/[0-9a-f]{2}/gi);

}

It's important to note that these functions do not guarantee returning 3 pairs. For example, passing "_?!@#$#00FF00FF" would result in ["00", "FF", "00", "FF"]. Similarly, providing "00FF0" would only give ["00", "FF"] due to finding 2 complete pairs.

In summary, consider incorporating error-checking measures.

Answer 4

function extractRGB(hexValue) {

    return hexValue.toUpperCase().match(/[0-9A-F]{2}/g);

}

To obtain the hexadecimal pairs from a string, convert it to uppercase and use a basic regular expression for extraction. Although converting to uppercase is not essential, it ensures consistency in the extracted pairs. You can also opt to convert all alpha characters to lowercase instead (changing "A-F" to "a-f" in the regex):

function extractRGB(hexValue) {

    return hexValue.toLowerCase().match(/[0-9a-f]{2}/g);

}

If case sensitivity isn't a concern, you can make the regex case insensitive by adding the "i" modifier:

function extractRGB(hexValue) {

    return hexValue.match(/[0-9a-f]{2}/gi);

}

It's important to note that these functions do not guarantee returning 3 pairs. For example, passing "_?!@#$#00FF00FF" would result in ["00", "FF", "00", "FF"]. Similarly, providing "00FF0" would only give ["00", "FF"] due to finding 2 complete pairs.

In summary, consider incorporating error-checking measures.

Answer 5

Answer №3

One way to handle the string is by passing through it and inserting commas between pairs before splitting the string:

function extractRGB(hexValue) {
  var commaSeparated = '';

  // Removing the first character of the input string
  hexValue = hexValue.substring(1, hexValue.length);

  // Separating the pairs by comma
  for (var index = 0; index < hexValue.length; index++) {
    // Looping through each character of hexValue

    // Appending each character to commaSeparated
    commaSeparated += hexValue.charAt(index);

    // Adding a comma after every pair of characters, except for the last character
    commaSeparated += (index % 2 == 1 && index != (hexValue.length - 1)) ? ',' : '';
  }
  // Splitting the commaSeparated string by commas and returning the array
  return commaSeparated.split(',');
}

console.log(extractRGB("#00FF00"));    //  ["00", "FF", "00"]

Answer 6

One way to handle the string is by passing through it and inserting commas between pairs before splitting the string:

function extractRGB(hexValue) {
  var commaSeparated = '';

  // Removing the first character of the input string
  hexValue = hexValue.substring(1, hexValue.length);

  // Separating the pairs by comma
  for (var index = 0; index < hexValue.length; index++) {
    // Looping through each character of hexValue

    // Appending each character to commaSeparated
    commaSeparated += hexValue.charAt(index);

    // Adding a comma after every pair of characters, except for the last character
    commaSeparated += (index % 2 == 1 && index != (hexValue.length - 1)) ? ',' : '';
  }
  // Splitting the commaSeparated string by commas and returning the array
  return commaSeparated.split(',');
}

console.log(extractRGB("#00FF00"));    //  ["00", "FF", "00"]

Answer 7

Answer №4

function convertHexToRGB(hexColor) {
  var pattern = /^#([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i;
  hexColor = hexColor.replace(pattern, "$1,$2,$3");
  return hexColor.split(",");
}

It's important to validate input values and consider ways to optimize the code further, but this straightforward approach can achieve the desired outcome.

Answer 8

function convertHexToRGB(hexColor) {
  var pattern = /^#([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i;
  hexColor = hexColor.replace(pattern, "$1,$2,$3");
  return hexColor.split(",");
}

It's important to validate input values and consider ways to optimize the code further, but this straightforward approach can achieve the desired outcome.

Separate a string into an array containing pairs of numbers

Answer №1

Answer №2

Answer №3

Answer №4

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