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Why doesn't Haskell's Prelude.read return a Maybe?
...ilable in the Text.Read module in the base package, along with readEither: http://hackage.haskell.org/packages/archive/base/latest/doc/html/Text-Read.html#v:readMaybe
Great question! The type of read itself isn't changing anytime soon because that would break lots of things. However, there should...
String concatenation in Ruby
...
from http://greyblake.com/blog/2012/09/02/ruby-perfomance-tricks/
Using << aka concat is far more efficient than +=, as the latter creates a temporal object and overrides the first object with the new object.
require 'benc...
How to pass “Null” (a real surname!) to a SOAP web service in ActionScript 3
...
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" initialize="application1_initializeHandler(even...
What's the fastest way to loop through an array in JavaScript?
...
After performing this test with most modern browsers:
https://jsben.ch/wY5fo
Currently, the fastest form of loop (and in my opinion the most syntactically obvious).
A standard for-loop with length caching
var i = 0, len = myArray.length;
while (i < len) {
// y...
MySQL “WITH” clause
... table expressions, including recursive CTEs.
Here's a blog announcing it: http://mysqlserverteam.com/mysql-8-0-labs-recursive-common-table-expressions-in-mysql-ctes/
Below is my earlier answer, which I originally wrote in 2008.
MySQL 5.x does not support queries using the WITH syntax defined in SQ...
What is the optimal Jewish toenail cutting algorithm?
...ly sorted permutation (1, 2, .. 5), and you'll have a random permutation. http://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle
But in general, the generate and test method seems totally fine to me, so long as the probability of generating a successful entry is high enough. I am sure there an...
How to remove the querystring and get only the url?
...l_parts['path']:'');
return $constructed_url;
}
$test = array(
'http://www.mydomian.com/myurl.html?unwan=abc',
'http://www.mydomian.com/myurl.html',
'http://www.mydomian.com',
'https://mydomian.com/myurl.html?unwan=abc&ab=1'
);
foreach($test as $url){
print_r(parse_ur...
Is it possible to display inline images from html in an Android TextView?
...ins " +
"two images: <br/>" +
"<img src=\"http://developer.android.com/assets/images/dac_logo.png\"><br/>and<br/>" +
"<img src=\"http://www.hdwallpapersimages.com/wp-content/uploads/2014/01/Winter-Tiger-Wild-Cat-Images.jpg\">";
St...
Regular expression for matching latitude/longitude coordinates?
....)(\d+)(,)))(\s*)(([-+]?)([\d]{1,3})((\.)(\d+))?(\)))$
Check it out at:
http://regexpal.com/
Paste the expression in the top box, then put things like this in the bottom box:
(80.0123, -34.034)
(80.0123)
(80.a)
(980.13, 40)
(99.000, 122.000)
Regex breakdown:
^ # The string...
Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
...orFilterGenerator
{
/**
* Creates a HUE ajustment ColorFilter
* @see http://groups.google.com/group/android-developers/browse_thread/thread/9e215c83c3819953
* @see http://gskinner.com/blog/archives/2007/12/colormatrix_cla.html
* @param value degrees to shift the hue.
* @return
*/
public st...