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Format Float to n decimal places
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You may also pass the float value, and use:
String.format("%.2f", floatValue);
Documentation
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Modulo operator with negative values [duplicate]
...rom ISO14882:2011(e) 5.6-4:
The binary / operator yields the quotient, and the binary % operator
yields the remainder from the division of the first expression by the
second. If the second operand of / or % is zero the behavior is
undefined. For integral operands the / operator yields the ...
JavaScript hashmap equivalent
...doo.
When using objects as maps, you have to remember that the key will be converted to a string value via toString(), which results in mapping 5 and '5' to the same value and all objects which don't overwrite the toString() method to the value indexed by '[object Object]'. You might also involuntar...
Intro to GPU programming [closed]
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You get programmable vertex and
pixel shaders that allow execution
of code directly on the GPU to
manipulate the buffers that are to
be drawn. These languages (i.e.
OpenGL's GL Shader Lang and High
Level Shader Lang and DirectX's equivalents
), are C s...
When do we have to use copy constructors?
...ovided copy constructor will break the internal intra-object associations, converting them to inter-object associations.
An example:
struct MarriedMan;
struct MarriedWoman;
struct MarriedMan {
// ...
MarriedWoman* wife; // association
};
struct MarriedWoman {
// ...
MarriedMan*...
@property retain, assign, copy, nonatomic in Objective-C
...retain is the same as strong.
-apple says if you write retain it will auto converted/work like strong only.
-methods like "alloc" include an implicit "retain"
Example:
@property (nonatomic, retain) NSString *name;
@synthesize name;
assign
-assign is the default and simply performs a variable...
Defining Z order of views of RelativeLayout in Android
I would like to define the z order of the views of a RelativeLayout in Android.
13 Answers
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Retrieve CPU usage and memory usage of a single process on Linux?
I want to get the CPU and memory usage of a single process on Linux - I know the PID. Hopefully, I can get it every second and write it to a CSV using the 'watch' command. What command can I use to get this info from the Linux command-line?
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mysql Foreign key constraint is incorrectly formed error
I have two tables, table1 is the parent table with a column ID and table2 with a column IDFromTable1 (not the actual name) when I put a FK on IDFromTable1 to ID in table1 I get the error Foreign key constraint is incorrectly formed error . I would like to delete table 2 record if tab...
How to get random value out of an array?
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You can also do just:
$k = array_rand($array);
$v = $array[$k];
This is the way to do it when you have an associative array.
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