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What is the usefulness of `enable_shared_from_this`?
...swered Apr 3 '09 at 2:00
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android:drawableLeft margin and/or padding
... mm (millimeters).
This may also be a reference to a resource (in the form
"@[package:]type:name") or theme attribute (in the form
"?[package:][type:]name") containing a value of this type.
This corresponds to the global attribute resource symbol
drawablePadding.
...
Check if $_POST exists
...return a blank value.
If your $_POST is coming from a user-inputted field/form and is left blank, I BELIEVE (I am not 100% certain on this though) that the value will be "" but NOT NULL.
Even if that assumption is incorrect (someone please correct me if I'm wrong!) the above is still good to know ...
Does Haskell require a garbage collector?
...l requires a garbage collector, since garbage collection is the highest-performance automatic dynamic memory manager.
However...
Although a garbage collector is necessary, we might try to find some special cases where the compiler can use a cheaper memory management scheme than garbage collection....
How to change CSS using jQuery?
...ar things up a little, since some of the answers are providing incorrect information:
The jQuery .css() method allows the use of either DOM or CSS notation in many cases. So, both backgroundColor and background-color will get the job done.
Additionally, when you call .css() with arguments you ha...
Logic to test that 3 of 4 are True
...
Long but very simple, (disjuntive) normal form:
(~a & b & c & d) | (a & ~b & c & d) | (a & b & ~c & d) | (a & b & c & ~d)
It may be simplified but that requires more thinking :P
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Should I size a textarea with CSS width / height or HTML cols / rows attributes?
Every time I develop a new form that includes a textarea I have the following dilemma when I need to specify its dimensions:
...
What is the difference between sed and awk? [closed]
...e, you could replace all the negative numbers in some text that are in the form "minus-sign followed by a sequence of digits" (e.g. "-231.45") with the "accountant's brackets" form (e.g. "(231.45)") using this (which has room for improvement):
sed 's/-\([0-9.]\+\)/(\1)/g' inputfile
I would use aw...
Can JSON start with “[”?
...eroperable in the sense that all
implementations will accept these as conforming JSON texts.
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Invalid argument supplied for foreach()
... an error, it might cause another one.
Be aware: If you expect a specific form of array to be returned, this might fail you. More checks are required for that.
E.g. casting a boolean to an array (array)bool, will NOT result in an empty array, but an array with one element containing the boolean...