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javascript and long strings

I have not been a fan of NodeJS but recently I have been writing a lot of JavaScript. As a result of this bias I found myself passing on perl, python and ruby in order to "template" a SQL script in favor of NodeJS. (I suppose if I had to use a single callback I would have a different opinion but I did like the utility nature of the experience.)

Installing node and the necessary dependencies was pretty simple:

# install NVM (nodejs version manager)
curl https://raw.github.com/creationix/nvm/master/install.sh | sh

# install nodejs
nvm install 0.8.16

# I'm not certaint if this is required but I USE and set this version of nodejs as default.
nvm use 0.8.16
nvm alias default 0.8.16

# install the mustache template library 
npm install mustache

# install the sprintf library because it's simple
npm install sprintf

That's it. The rest of the project was my code. Initially I was looking for some "javascript long string" help in google and I did find some useful examples, however, some did not work with NodeJS. Like

  1. var string = (<r><![CDATA[ 
  2.  
  3.    The text string goes here.  Since this is a XML CDATA section, 
  4.    stuff like <> work fine too, even if definitely invalid XML.  
  5.  
  6. ]]></r>).toString();
(snipped from here)

This example might work in a browser but it does not seem to work in NodeJS. As an aside there was a  CoffeeScript version that I liked but I was not going to install CoffeeScript as a dependency for this little trinket.

Ultimately I implemented this:

function hereDoc(f) {
return f.toString().
replace
(/^[^\/]+\/\*!?/, '').
replace
(/\*\/[^\/]+$/, '');
}
You can have here-documents like this:
var tennysonQuote = hereDoc(function() {/*!
Theirs not to make reply,
Theirs not to reason why,
Theirs but to do and die
*/
});

and it worked great. I put the rest of the bits together and I'm generating SQL like I had hoped. By the time I have to run this script again I hope to clean it up and automate it so I never have to run it again.


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