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Why are quaternions used for rotations?
...otations of an orientation. Imagine you have an object in space. And every timeslice, you apply a small change of yaw to it. After each change, you need to re-normalize the orientation; otherwise, precision problems will creep in and screw things up.
If you use matrices, each time you do matrix mul...
Replacements for switch statement in Python?
...
There is a problems with this approach, first each time you call f you going to create the dict again second if you have more complex value you can get an exceptions ex. if x is a tuple and we are want to do something like this x = ('a') def f(x): return { 'a': x[0], 'b': x[1...
Ways to implement data versioning in MongoDB
...make my life easy, I would make a history document contain a dictionary of time-stamped diffs. Something like this:
{
_id : "id of address book record",
changes : {
1234567 : { "city" : "Omaha", "state" : "Nebraska" },
1234568 : { "city" : "Kansas City", "st...
find filenames NOT ending in specific extensions on Unix?
Is there a simple way to recursively find all files in a directory hierarchy, that do not end in a list of extensions? E.g. all files that are not *.dll or *.exe
...
Android adb not found
When I run my android app from eclipse, I get this error.
20 Answers
20
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How to handle screen orientation change when progress dialog and background thread active?
...ating a progress dialog for a download or something else that takes a long time. As a user you won't stay on that activity and stare at it. You would switch to the home screen or to another app like a game or a phone call might come in or something else resource hungry that will eventually destroy y...
Jquery bind double click and single click separately
... this alternate version is useful to others.
var DELAY = 700, clicks = 0, timer = null;
$(function(){
$("a").on("click", function(e){
clicks++; //count clicks
if(clicks === 1) {
timer = setTimeout(function() {
alert("Single Click"); //perform ...
How to find what code is run by a button or element in Chrome using Developer Tools
...ly reached
In the jsFiddle sample provided above, I had to press F11 108 times before reaching the desired event handler/function
Your mileage may vary, depending on the version of jQuery (or framework library) used to bind the events
With enough dedication and time, you can find any event handler...
gitignore without binary files
How can binary files be ignored in git using the .gitignore file?
18 Answers
18
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Most lightweight way to create a random string and a random hexadecimal number
What is the most lightweight way to create a random string of 30 characters like the following?
13 Answers
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