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Gavin Kistner http://phrogz.net/

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Splitting/Joining URLs

File.dirname "http://foo.com/bar/stuff.html"
#=> "http://foo.com/bar"

File.basename "http://foo.com/bar/stuff.html"
#=> "stuff.html"

File.split "http://foo.com/bar/stuff.html"
#=> ["http://foo.com/bar", "stuff.html"]

File.join( File.dirname("http://foo.com/bar/doc.html"), "relative_link.html" )
# => "http://foo.com/bar/relative_link.html"

(Originally by Ilmari Heikkinen on the ruby-talk mailing list.)

to ruby rails html web by Phrogz on Apr 29, 2005

Loop through an array without wasteful lookups

Looking up the length of an array on each iteration of a loop is slow and inefficient (if the length of the array isn't changing).

If it's OK to iterate from back to front:

for ( var i=myArray.length-1; i>=0; --i ){
  ...
}

If you need to go from front to back:

for ( var i=0, len=myArray.length; i<len; ++i ){
  ...
}

to javascript by Phrogz on Apr 03, 2005 2 Comments

Add a JS function for bounded random numbers

Math.randomMax = function(maxVal,asFloat){
	var val = Math.random()*maxVal;
	return asFloat?val:Math.round(val);
}

For a random integer between 0 and 10 (inclusive), simply:

var theNumber = Math.randomMax( 10 );

For a random float value between 0 and 10, pass a truth value to the second parameter:

var theNumber = Math.randomMax( 10, true );

to javascript by Phrogz on Apr 03, 2005