Random Learning - an overlooked detail

Aug 3 (edited) • Random

I just learned that declaring a variable using 'const' doesn't mean it can't be altered, it just means that the variable can't be reassigned.

For example:

const arr = [];

arr.push(10) //Adds 10 to the arr without any problem, whereas

arr = [10] //Throws an error saying "TypeError: Assignment to constant variable."

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And one more thing..... to convert "camelCase" to "Camel Case",

"const newText = string.replace(/([A-Z]+)/g, ' $1')

.replace(/^./, str => str.toUpperCase() )"

can be used instead of

"const newText = string

.replace(/([a-z])([A-Z])/g, "$1 $2")

.replace(/([A-Z])([a-z])/g, " $1$2")

.replace(/\ +/g, " ");

const nextString = newText[0].toUpperCase() + newText.slice(1);" to do the exact same thing.

Works for any type of string and that "+" after "[A-Z]" makes all the difference.

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