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unable to install pg gem
...
Worked for me by apt-get install libpq-dev. Thanks for the hint.
– Ryanmt
Jul 15 '11 at 17:09
5
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Appropriate datatype for holding percent values?
... decimal is ANSI compliant, so always use that unless told otherwise (e.g. by your company's coding standards).
Example Scenarios
For your case (0.00% to 100.00%) you'd want decimal(5,4).
For the most common case (0% to 100%) you'd want decimal(3,2).
In both of the above, the check constraints w...
Declare a const array
...ight not be the most efficient solution.
But if you re-use the same array (by putting it in a private attribute for instance) it will again open up the possibility to change the contents of the array.
If you want to have an immutable array (or list) you could also use:
public static IReadOnlyList&...
How to remove a Gitlab project?
...ct. If the project is in a project-group, and the project-group is created by another one, then the owner is the creator of the project-group by default.
You can find the owner's name of the project in the page Settings -> Members.
...
Resolving a Git conflict with binary files
...y autocommits after merging, but when it detects conflicts it cannot solve by itself, it applies all patches it figured out and leaves the rest for you to resolve and commit manually. The Git Merge Man Page, the Git-SVN Crash Course or this blog entry might shed some light on how it's supposed to wo...
Maximum packet size for a TCP connection
...
The absolute limitation on TCP packet size is 64K (65535 bytes), but in practicality this is far larger than the size of any packet you will see, because the lower layers (e.g. ethernet) have lower packet sizes.
The MTU (Maximum Transmission Unit) for Ethernet, for instance, is 15...
Static class initializer in PHP
...
Sounds like you'd be better served by a singleton rather than a bunch of static methods
class Singleton
{
/**
*
* @var Singleton
*/
private static $instance;
private function __construct()
{
// Your "heavy" initialization stuff here
}...
How to toggle a value in Python
...>> x
1
The technique generalizes to any pair of integers. The xor-by-one step is replaced with a xor-by-precomputed-constant:
>>> A = 205
>>> B = -117
>>> t = A ^ B # precomputed toggle constant
>>> x = A
>>> x ^= t # toggle
>...
What exactly do the Vagrant commands do?
...you may need.
vagrant gem is used to install Vagrant plugins via the RubyGems
system. In fact, vagrant gem is just a frontend to the actual gem
interface, with the difference being that Vagrant sets up a custom
directory where gems are installed so that they are isolated from your
system...
Handle file download from ajax post
... // IE workaround for "HTML7007: One or more blob URLs were revoked by closing the blob for which they were created. These URLs will no longer resolve as the data backing the URL has been freed."
window.navigator.msSaveBlob(blob, filename);
} else {
var URL = w...