Finding Plus Sign in Regular Expression

Question

var string = \'abcd+1\';
var pattern = \'d+1\'
var reg = new RegExp(pattern,\'\');
alert(string.search(reg));

I found out last night that if you tr

Answer 1

\-\.\/\[\]\\ **always** need escaping
\*\+\?\)\{\}\| need escaping when **not** in a character class- [a-z*+{}()?]

But if you are unsure, it does no harm to include the escape before a non-word character you are trying to match.

A digit or letter is a word character, escaping a digit refers to a previous match, escaping a letter can match an unprintable character, like a newline (\n), tab (\t) or word boundary (\b), or a a set of characters, like any word-character (\w), any non-word character (\W).

Don't escape a letter or digit unless you mean it.