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Does PNG contain EXIF data like JPG?
...llows, however, to embed metadata "chunks" inside the image. Some of the standardized chunks correspond to a few EXIF attributes (physical dimensions, timestamp). And it's also possible to store arbitrary textual data as key=>value pairs, or to define new chunk types. So, you could in theory stor...
Does MySQL ignore null values on unique constraints?
...sult:
x
NULL
NULL
1
This is not true for all databases. SQL Server 2005 and older, for example, only allows a single NULL value in a column that has a unique constraint.
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What regex will match every character except comma ',' or semi-colon ';'?
...tion you are using. Most of them have a Split method that takes delimiters and split by them. You might want to use that one with a "normal" (without ^) character class:
[,;]+
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Checking if an Android application is running in the background
... completely reliable:
The right solution (credits go to Dan, CommonsWare and NeTeInStEiN)
Track visibility of your application by yourself using Activity.onPause, Activity.onResume methods. Store "visibility" status in some other class. Good choices are your own implementation of the Application o...
What is the best Java email address validation method? [closed]
...verification email to the address if you want to ensure it's a real email, and that the owner wants it used on your site.
EDIT: There was a bug where it was too restrictive on domain, causing it to not accept valid emails from new TLDs.
This bug was resolved on 03/Jan/15 02:48 in commons-validator ...
AngularJS $http and $resource
...With $http you're going to be making GET, POST, DELETE type calls manually and processing the objects they return on your own.
$resource wraps $http for use in RESTful web API scenarios.
Speaking VERY generally: A RESTful web service will be a service with one endpoint for a data type that does...
When to use window.opener / window.parent / window.top
...hen opening a new window that acted as a dialog which required user input, and needed to pass information back to the main window. However this is restricted by origin policy, so you need to ensure both the content from the dialog and the opener window are loaded from the same origin.
window.paren...
phantomjs not waiting for “full” page load
...or if it takes longer than a second, it will still fail. Such inefficiency and unreliability is unbearable for professional work.
– CodeManX
Jul 15 '15 at 9:35
9
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How do I parse an ISO 8601-formatted date?
...atetime strings like the one in the question, but also other ISO 8601 date and time strings that don't comply with RFC 3339 (such as ones with no UTC offset, or ones that represent only a date).
>>> import dateutil.parser
>>> dateutil.parser.isoparse('2008-09-03T20:56:35.450686Z'...
Declaring variables inside loops, good practice or bad practice?
...
The compiler knows that the variable scope is limited to inside the loop, and therefore will issue a proper error message if the variable is by mistake referenced elsewhere.
Last but not least, some dedicated optimization can be performed more efficiently by the compiler (most importantly register ...