Changing a variable's value to a string in JavaScript

Question

Changing a variable's value to a string in JavaScript

Currently, I am utilizing a method in Tone.js that requires strings as arguments. Is there a way to define the variables at the beginning and then maintain them within their respective quotation marks?

The following is the syntax that functions correctly:

var chain = new Tone.CtrlMarkov({
"D2": "D4",
"D4": ["D2","D3"],
"D3":"D2"
});

This is what I am attempting to achieve (and have experimented with different combinations of using quotes, omitting them, or employing the val1.toString() method:

var val1 = "D2"; //trying using quotes
var val2 = D4;  //trying not using quotes
var val3 = D3;
var chain = new Tone.CtrlMarkov({
val1: val2,
val2: [val1,val3],
val3.toString(): val1 //trying toString method
});

Thank you! For further reference, the documentation for the library can be found here and my jsfiddle demonstration is available here.

javascript string

Answer 1

Answer №1

Within this

{ val1: .., val2: ..., val3: .. }

structure, var1, var2, and var3 serve as the property names in a literal sense, not representing variable values. Therefore, this approach will not function as intended.

To achieve the desired outcome, you can utilize the object[property] notation.

Your code can be translated as follows:

var var1 = "D1";
var var2 = "D2";
var var3 = "D3";

// create an empty object
var obj = {};

// populate the object using the object[property] method
obj[var1] = var2; // equivalent to obj.D1 = "D2"
obj[var2] = [var2, var3]; // equivalent to obj.D2 = ["D1", "D3"]
obj[val3] = var1; // equivalent to obj.D3 = "D1"

// proceed with using the object
ar chain = new Tone.CtrlMarkov(obj);

Answer 2

Within this

{ val1: .., val2: ..., val3: .. }

structure, var1, var2, and var3 serve as the property names in a literal sense, not representing variable values. Therefore, this approach will not function as intended.

To achieve the desired outcome, you can utilize the object[property] notation.

Your code can be translated as follows:

var var1 = "D1";
var var2 = "D2";
var var3 = "D3";

// create an empty object
var obj = {};

// populate the object using the object[property] method
obj[var1] = var2; // equivalent to obj.D1 = "D2"
obj[var2] = [var2, var3]; // equivalent to obj.D2 = ["D1", "D3"]
obj[val3] = var1; // equivalent to obj.D3 = "D1"

// proceed with using the object
ar chain = new Tone.CtrlMarkov(obj);

Changing a variable's value to a string in JavaScript

Answer №1

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