I am working with a JavaScript array that looks like this:
const colors = ['blue', 'red', 'green'];
If I have a number ranging from 0 to Infinity, how can I retrieve a color value in the following pattern:
colors[0] === 'blue';
colors[1] === 'red';
colors[2] === 'green';
colors[3] === 'blue';
colors[4] === 'red';
colors[5] === 'green';
// …
Once all elements of the array have been accessed, retrieving colors based on numerical values should cycle through the array sequentially.
If you have a number "x" that falls between 0 and infinity:
colors[x % colors.length]
This formula will return one of your designated colors
It appears that completing this task is relatively straightforward; you just need to utilize the modulo % operator when searching for a specific index, like so:
const colors = ['blue', 'red', 'green', 'pink', 'black', 'white', 'anyother'];
function getColor(idx){
return colors[idx % colors.length]
}
getColor(0) // "blue"
getColor(7) // "blue"
getColor(8) // "red"
getColor(13) // "anyother"
getColor(14) // "blue"
getColor(21) // "blue"
By implementing this method, your array will remain unchanged and you will avoid accessing an index beyond the length of your array.
To find the remainder of a division operation, you can use the modulus (%) operator.
For example:
if num % 3 == 0
color = 'blue';
if num % 3 == 1
color = 'red';
if num % 3 == 2
color = 'green';
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