I used this to remove white spaces from a string.
returnString.split(" ").filter(substr => substr !== "");
In my head it should be this:
returnString.split(" ").filter(substr => substr !== " ") //note the space between the " "
why doesnt the bottom one work? Is it JS sytax?
Answer: If theres a space at the beginning of the string, its split with an empty string, (so substr !== "") removes that from the returned array when splitting the string.
returnString.replace(/\s/g,'') Would be a superior way of doing this.
"" is an empty string.
" " is a space character.
They cannot be used interchangeably.
"" is an empty string.
If there is a space at the beginning of the string, it will split that space with an empty string.
that is why substr !== "" is needed to remove the empty string.
As mentioned in the comments, you’re splitting on whitespaces, creating indices for said whitespaces in an array.
const returnString = 'Hello I am Victor'
const str = returnString.split("").filter(substr => substr !== " ");
console.log(str.join(''))
would get you the desired result.
However, a regex pattern would be best suited for this use case.
returnString.replace(/\s/g, '')