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How big can a user agent string get?
...it exceeds.
Depending on web-server and their settings these limits vary from 4KB to 64KB (total for all headers).
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What is the purpose of the “role” attribute in HTML?
...the unusual HTML client, the attribute needs to be set to one of the roles from the spec I linked. If you make up your own, this 'future' functionality can't work - a comment would be better.
Practicalities here: http://www.accessibleculture.org/articles/2011/04/html5-aria-2011/
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Difference between var_dump,var_export & print_r
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var_dump and var_export relate like this (from the manual)
var_export() gets structured
information about the given variable.
It is similar to var_dump() with one
exception: the returned representation
is valid PHP code.
They differ from print_r that va...
Django queries - id vs pk
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It doesn't matter. pk is more independent from the actual primary key field i.e. you don't need to care whether the primary key field is called id or object_id or whatever.
It also provides more consistency if you have models with different primary key fields.
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How can I deserialize JSON to a simple Dictionary in ASP.NET?
...a simple case is to avoid the need for external DLLs. I'm accessing an API from a standalone console that can only rely the .Net framework.
– Nick.T
May 20 '16 at 8:59
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Using “this” with class name
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ClassName.this is used to reference the current instance of an outerclass from an inner class.
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Measure elapsed time in Swift
... negative time. There is actually mach_absolute_time which does not suffer from this problem, so I am wondering why that one is not widely known. Maybe just because it is not well documented.
– Franklin Yu
May 25 '16 at 17:06
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Programmatically scroll a UIScrollView
...y: y), animated: true)
See the guide "Scrolling the Scroll View Content" from Apple as well.
To do slideshows with UIScrollView, you arrange all images in the scroll view, set up a repeated timer, then -setContentOffset:animated: when the timer fires.
But a more efficient approach is to use 2 im...
How to get the tag HTML with JavaScript / jQuery?
...t.querySelector("html");
And if you want to use jQuery to get attributes from it...
$(htmlElement).attr(INSERT-ATTRIBUTE-NAME);
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Why doesn't “System.out.println” work in Android?
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if you really need System.out.println to work(eg. it's called from third party library). you can simply use reflection to change out field in System.class:
try{
Field outField = System.class.getDeclaredField("out");
Field modifiersField = Field.class.getDeclaredField("accessFla...