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Location Services not working in iOS 8
...cationManager is needed before starting location updates.
There also needs to be NSLocationAlwaysUsageDescription or NSLocationWhenInUseUsageDescription key in Info.plist with a message to be displayed in the prompt. Adding these solved my problem.
For more extensive information, have a look at: Co...
How can I force clients to refresh JavaScript files?
...ss of making fairly rapid changes, although obviously as usage is starting to ramp up, we will be slowing down this process. That being said, one issue we are running into is that after we push out an update with new JavaScript files, the client browsers still use the cached version of the file and...
Is BCrypt a good hashing algorithm to use in C#? Where can I find it? [closed]
...ng a string and producing a sequence of characters that cannot be reverted to the original string.
Symmetric Encryption - (Usually just referred to as 'encryption') - The act of taking a string and producing a sequence of characters that can be decrypted to the original string through the use of t...
How to serialize SqlAlchemy result to JSON?
Django has some good automatic serialization of ORM models returned from DB to JSON format.
26 Answers
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Is floating point math broken?
... power of two; rational numbers (such as 0.1, which is 1/10) whose denominator is not a power of two cannot be exactly represented.
For 0.1 in the standard binary64 format, the representation can be written exactly as
0.1000000000000000055511151231257827021181583404541015625 in decimal, or
0x1.99...
Why is std::map implemented as a red-black tree?
...t common self balancing tree algorithms are Red-Black trees and AVL trees. To balance the tree after an insertion/update both algorithms use the notion of rotations where the nodes of the tree are rotated to perform the re-balancing.
While in both algorithms the insert/delete operations are O(log ...
AI2 Keep Awake
...rarely as possible and release them as soon as possible. If actions are to be performed only occasionally, it is not necessary for the CPU to be constantly active. Instead, an alarm can be used (see UrsAI2Alarm ). Motivation For some projects it is necessary to prevent the associated ap...
How to search and replace globally, starting from the cursor position and wrapping around the end of
...
1. It is not hard to achieve the behavior using a two-step substitution:
:,$s/BEFORE/AFTER/gc|1,''-&&
First, the substitution command is run for each line starting from
the current one until the end of file:
,$s/BEFORE/AFTER/gc
Then,...
AngularJS : How to watch service variables?
...
You can always use the good old observer pattern if you want to avoid the tyranny and overhead of $watch.
In the service:
factory('aService', function() {
var observerCallbacks = [];
//register an observer
this.registerObserverCallback = function(callback){
observerCallbac...
Failed to serialize the response in Web API with Json
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When it comes to returning data back to the consumer from Web Api (or any other web service for that matter), I highly recommend not passing back entities that come from a database. It is much more reliable and maintainable to use Models ...