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Is an index needed for a primary key in SQLite?
...base to optimize
queries. As a result, there often no advantage (but significant
overhead) in creating an index on a set of columns that are already
collectively subject to a UNIQUE or PRIMARY KEY constraint.
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Simplest way to profile a PHP script
...ne file for each PHP request / process that is executed. So, for example, if you wish to analyze a form post, one profile will be written for the GET request to display the HTML form. The XDEBUG_PROFILE parameter will need to be passed into the subsequent POST request to analyze the second request...
Having options in argparse with a dash
...
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
...
Using Git with an existing Xcode project
...d .
git commit -m "Initial commit"
Restart Xcode.
The repository should now be set up, and you will be able to manage it in xcode 4.
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How can I convert NSDictionary to NSData and vice versa?
...
In Swift 2 you can do it in this way:
var dictionary: NSDictionary = ...
/* NSDictionary to NSData */
let data = NSKeyedArchiver.archivedDataWithRootObject(dictionary)
/* NSData to NSDictionary */
let unarchivedDictionary = NSK...
.NET obfuscation tools/strategy [closed]
...ly, to IL, to C# code and have it compiled again with very little effort.
Now with .Net 3.5 I'm not at all sure. Try decompiling a 3.5 assembly; what you get is a long long way from compiling.
Add the optimisations from 3.5 (far better than 1.1) and the way anonymous types, delegates and so on ar...
How to get current timestamp in string format in Java? “yyyy.MM.dd.HH.mm.ss”
...me old date-time classes such as java.util.Date and java.sql.Timestamp are now legacy, supplanted by the java.time classes built into Java 8 and later. See Tutorial by Oracle.
– Basil Bourque
Dec 24 '18 at 20:01
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Convert UTC to local time in Rails 3
...rake -D time
So, to convert to EST, catering for DST automatically:
Time.now.in_time_zone("Eastern Time (US & Canada)")
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Offset a background image from the right using CSS
...10px from the right */
background-position: right 10px top;
As far as I know this is not supported in IE8. In latest Chrome/Firefox it works fine.
See Can I use for details on the supported browsers.
Used source: http://tanalin.com/en/blog/2011/09/css3-background-position/
Update:
This feature...
What is the difference between a thread and a fiber?
What is the difference between a thread and a fiber? I've heard of fibers from ruby and I've read heard they're available in other languages, could somebody explain to me in simple terms what is the difference between a thread and a fiber.
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