What is the process for designing a function that targets a particular array?

Question

What is the process for designing a function that targets a particular array?

I am currently working on a function that needs to choose a specific array based on the button that triggers it.

For instance:

If a button with id="Anterior" activates the function, it should select the array named plusAnterior:

var plusAnterior = ["p", "b", "t", "d", "ɸ", "β", "f", "v", "θ", "ð", "s", "z", "m", "n", "l", "ɬ", "r", "ɾ"];
var minusAnterior = ["c", "ɟ", "k", "g", "ʃ", "ʒ", "x", "ɣ", "ɲ", "ŋ", "j", "w", "ʡ", "h"];
var toAdd = [];

function addFeature(featureId) {
  if (activeFeatures === 0) {
    toAdd = // plusAnterior selected here
  }
}

The issue I'm facing is that I need the function to be flexible enough to work with any button press. I considered using something like

getElementById("plus" + featureId)

, but I can't since the arrays are not defined in my HTML document.

Your assistance will be greatly appreciated.

javascript arrays

Answer 1

Answer №1

When working with JavaScript, you have the flexibility to utilize an object in a manner similar to a key/value array.

var testObject = {
  featureId_a: [1, 2, 3, 4, 5], // etc
  featureId_b: [1, 2, 3, 4, 5] // etc
}

You can then retrieve specific data using a custom method like this:

function addFeature(featureId) {
  return testObject[featureId];
}

This approach allows for easy access to your data. However, it's worth considering other structures such as 2D arrays depending on the nature of your data. Remember to validate inputs by checking if the property exists before retrieving it:

if(testObject.hasOwnProperty(featureId)){
  return testObject[featureId];
}

Answer 2

When working with JavaScript, you have the flexibility to utilize an object in a manner similar to a key/value array.

var testObject = {
  featureId_a: [1, 2, 3, 4, 5], // etc
  featureId_b: [1, 2, 3, 4, 5] // etc
}

You can then retrieve specific data using a custom method like this:

function addFeature(featureId) {
  return testObject[featureId];
}

This approach allows for easy access to your data. However, it's worth considering other structures such as 2D arrays depending on the nature of your data. Remember to validate inputs by checking if the property exists before retrieving it:

if(testObject.hasOwnProperty(featureId)){
  return testObject[featureId];
}

What is the process for designing a function that targets a particular array?

Answer №1

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