Use a regular expression to remove leading and trailing spaces. - Node.js Regular expression

Node.js examples for Regular expression:Replace

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Description

Use a regular expression to remove leading and trailing spaces.

Demo Code


function trim(str)      // Use a regular expression to remove leading and trailing spaces.
{
    return str.replace(/^\s+ | \s+$/g, "");
    /* //from w  ww .  ja  va  2 s .c  o m
    Huh?  Take a breath.  Here we go:
    - The "|" separates this into two expressions, as in A or B.
    - "^\s+" matches a sequence of one or more whitespace characters at the beginning of a string.
    - "\s+$" is the same thing, but at the end of the string.
    - "g" makes is global, so we get all the whitespace.
    - "" is nothing, which is what we replace the whitespace with.
    */
    
}

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