Remove empty string characters from a javascript string

javascript, regex, string

Solution

Arrow keys are prefixed with `Escape` char(0x1B ASCII).

Add it to pattern and You will be golden.

var pattern = /\x1B\[([ABCD])/gm;
decodeURIComponent("%1B%5BD%1B%5BDhello%0D%0A").replace(pattern, "")

Problem

I'm using regex to remove keypresses from a string thats being inputed from a telnet client (node.js) but my regex expression, `input.replace(/\[(B|C|D|A)/gm,"");` seems to be having some weird effects `string` being my input is that snapshot. How do I remove those empty strings regex is putting at the beginning or is there a better way to write the expression so that they aren't created? here's the input string http://s21.postimg.org/91e01id13/input.png as a string its ``` "[D[A[C[D[B[D[A[B[C[Dhhh " ``` hitting the left arrow key twice and typing `hello` looks like this `"%1B%5BD%1B%5BDhello%0D%0A"` afer `encodeURIComponent(string);`

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