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Where to put include statements, header or source?
...g.
typedef union {
unsigned long l;
unsigned short lw[2];
unsigned char lb[4];
} U_QUAD;
(Yes, I know I'd be in trouble if I moved to a big-endian architecture, but since my compiler doesn't allow anonymous structs in unions, using named identifiers for the bytes within the union would req...
Where is Java's Array indexOf?
...ns all create new strings or lists or just handle single elements. Guava's Chars.indexOf lets you get the index of an array in an array. This is the correct solution.
– HappyEngineer
Jan 26 '16 at 1:14
...
How to use base class's constructors and assignment operator in C++?
...No operator=() defined
};
class Derived : public ImplicitBase {
const char* name_;
public:
Derived& operator=(const Derived& d)
{
ImplicitBase::operator=(d); // Call compiler generated operator=
name_ = strdup(d.name_);
return *this;
}
};
...
Sublime Text 2 and 3: open the same file multiple times
... the file in.
Type Ctrl-p (Mac: ⌘-p) to get the list of files available.
Select the one you're after and it will be loaded into the current pane
(Even if it's already open in another pane.)
share
|
...
Why do you need to create a cursor when querying a sqlite database?
...les traversal over the records in a database". For example c.execute('''SELECT * FROM users''') returns an iterator that you can call fetchall() on (or another cursor method). Some SQL queries return empty iterators, but that should be expected, not surprising.
– Powers
...
android pick images from gallery
....ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE);
Don't forget also to create the constant PICK_IMAGE, so you can recognize when the user comes back from the image gallery Activity:
public static final int PICK_IMAGE = 1;
@Override
public v...
Xcode : failed to get the task for process
...two Provisioning Profiles for the same name, Xcode5 will only allow you to select one of them. To work around this, you have to use iPhone Configuration Utility to find the Profile you want, find the 30-digit "Profile Identifier" and copy/paste it into the "Other" value of the Provisioning Profile d...
Hidden features of Perl?
...
One of my favourite features in Perl is using the boolean || operator to select between a set of choices.
$x = $a || $b;
# $x = $a, if $a is true.
# $x = $b, otherwise
This means one can write:
$x = $a || $b || $c || 0;
to take the first true value from $a, $b, and $c, or a default of 0...
Long vs Integer, long vs int, what to use and when?
...//docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
byte, char .. 1B .. 8b
short int .. 2B .. 16b
int .. .. .. .. 4B .. 32b
long int .. 8B .. 64b
C .. just mess: https://en.wikipedia.org/wiki/C_data_types
short .. .. 16b
int .. .. .. 16b ... wtf?!?!
long .. .. 32b
long long .. ...
Entity Framework: table without primary key
...mn as a primary key, use NULLIF.
An easy way to apply this is to wrap the select statement of your view in another select.
Example:
SELECT
ISNULL(MyPrimaryID,-999) MyPrimaryID,
NULLIF(AnotherProperty,'') AnotherProperty
FROM ( ... ) AS temp
answered Apr 26 '10 at 17:00 by Tillito
...