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How do I convert Long to byte[] and back in java
... doing cross-language or cross-platform, then sending the bytes in a known order is important. This method does that (it writes them "high byte first") according to the docs. The accepted answer does not (it writes them in the "current order" according to the docs). The question states that he wa...
Android Min SDK Version vs. Target SDK Version
...e not required for the target version (which may otherwise be turned on in order to maintain forward-compatibility) or enable newer features that are not available to older applications. This does not mean that you can program different features for different versions of the platform—it simply inf...
Sort NSArray of date strings or objects
...s @selector(compare:) as the parameter. The -[NSDate compare:] method will order dates in ascending order for you. This is simpler than creating an NSSortDescriptor, and much simpler than writing your own comparison function. (NSDate objects know how to compare themselves to each other at least as e...
Instance variables vs. class variables in Python
...ut how this works yet. It is very similar to variable access -- the search order of which is:
locals
nonlocals
globals
built-ins
For attribute access, the order is:
instance
class
base classes as determined by the MRO (method resolution order)
Both techniques work in an "inside-out" manner, ...
MySQL pagination without double-querying?
... problem with this: There is a bug in MySQL that this tickles that affects ORDER BY queries making it much slower on large tables than the naive approach of two queries.
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Laravel orderBy on a relationship
...p
public function comments()
{
return $this->hasMany('Comment')->orderBy('column');
}
[edit after comment]
<?php
class User
{
public function comments()
{
return $this->hasMany('Comment');
}
}
class Controller
{
public function index()
{
$colum...
How can I specify a local gem in my Gemfile?
...
In order to use local gem repository in a Rails project, follow the steps below:
Check if your gem folder is a git repository (the command is executed in the gem folder)
git rev-parse --is-inside-work-tree
Getting repository...
How do I deserialize a JSON string into an NSDictionary? (For iOS 5+)
...version:) can be used in conjunction with JSONDecoder's decode(_:from:) in order to deserialize a JSON string into a dictionary.
Furthermore, with Swift 3 and Swift 4, String's data(using:allowLossyConversion:) can also be used in conjunction with JSONSerialization's jsonObject(with:options:...
Lock, mutex, semaphore… what's the difference?
...task to another. A mutex is meant to be taken and released, always in that order, by each task that uses the shared resource it protects. By contrast, tasks that use semaphores either signal or wait—not both."
– ToolmakerSteve
Feb 2 '17 at 5:14
...
How can I iterate over files in a given directory?
...e rules used by the Unix shell, although results are returned in arbitrary order. No tilde expansion is done, but *, ?, and character ranges expressed with [] will be correctly matched.
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