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How do I check if an integer is even or odd? [closed]
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I then compiled these with gcc 4.1.3 on one of my machines 5 different times:
With no optimization flags.
With -O
With -Os
With -O2
With -O3
I examined the assembly output of each compile (using gcc -S) and found that in each case, the output for and.c and modulo.c were identical (they both us...
When to use NSInteger vs. int
...code they use NSInteger (or NSUInteger ) when passing a value as an argument to a function or returning a value from a function.
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Sorting a Python list by two fields
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how will i proceed if i want to sort ascending on one element and descending on other, using itemgetter??.
– ashish
Oct 12 '13 at 10:13
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NSUserDefaults removeObjectForKey vs. setObject:nil
..., when I type set(nil, forKey:...), and use "jump to definition", it takes me to the URL setter. The comment for that function says "-setURL:forKey is equivalent to -setObject:forKey: except that the value is archived to an NSData." This could explain why it is misbehaving - since there are two over...
How to resume Fragment from BackStack if exists
I am learning how to use fragments. I have three instances of Fragment that are initialized at the top of the class. I am adding the fragment to an activity like this:
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Primary key or Unique index?
...mn foo when it tries to insert the value 1 into this column for a second time.
In MySQL a unique constraint allows multiple NULLs.
It is possible to make a unique index on mutiple columns.
Primary key versus unique index
Things that are the same:
A primary key implies a unique index.
Things ...
How can I be notified when an element is added to the page?
I want a function of my choosing to run when a DOM element is added to the page. This is in the context of a browser extension, so the webpage runs independently of me and I cannot modify its source. What are my options here?
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Is JSON Hijacking still an issue in modern browsers?
...e to capture values passed to the [] or {} constructors in Firefox 21, Chrome 27, or IE 10. Here's a little test page, based on the main attacks described in http://www.thespanner.co.uk/2011/05/30/json-hijacking/:
(http://jsfiddle.net/ph3Uv/2/)
var capture = function() {
var ta = document...
Is a Java string really immutable?
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String is immutable* but this only means you cannot change it using its public API.
What you are doing here is circumventing the normal API, using reflection. The same way, you can change the values of enums, change the lookup table used in Integer autoboxin...
Which MySQL data type to use for storing boolean values
...ording to the MySQL manual you can use BOOL or BOOLEAN, which are at the moment aliases of tinyint(1):
Bool, Boolean: These types are synonyms for TINYINT(1). A value of
zero is considered false. Non-zero
values are considered true.
MySQL also states that:
We intend to implement full boolean
type...