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Random / noise functions for GLSL
...es yields 0.0, all ones yields the next smallest representable value below 1.0.
float floatConstruct( uint m ) {
const uint ieeeMantissa = 0x007FFFFFu; // binary32 mantissa bitmask
const uint ieeeOne = 0x3F800000u; // 1.0 in IEEE binary32
m &= ieeeMantissa; ...
Why doesn't C have unsigned floats?
...
C99 supports complex numbers, and a type generic form of sqrt, so sqrt( 1.0 * I) will be negative.
The commentors highlighted a slight gloss above, in that I was referring to the type-generic sqrt macro rather than the function, and it will return a scalar floating point value by truncation of...
Parsing query strings on Android
...
If you're using Spring 3.1 or greater (yikes, was hoping that support went back further), you can use the UriComponents and UriComponentsBuilder:
UriComponents components = UriComponentsBuilder.fromUri(uri).build();
List<String> myParam = co...
C# short/long/int literal format?
...
var d = 1.0d; // double
var d0 = 1.0; // double
var d1 = 1e+3; // double
var d2 = 1e-3; // double
var f = 1.0f; // float
var m = 1.0m; // decimal
var i = 1; // int
var ui = 1U; // uint
var ul = 1UL; // ulong
var l ...
Android and setting alpha for (image) view alpha
...(float) whose XML counterpart is android:alpha. It takes a range of 0.0 to 1.0 instead of 0 to 255. Use it e.g. like
<ImageView android:alpha="0.4">
However, the latter in available only since API level 11.
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What's the equivalent of Java's Thread.sleep() in Objective-C/Cocoa?
...
Sleeping for one second in Objective C:
[NSThread sleepForTimeInterval:1.0f];
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Get generic type of java.util.List
...ed Jan 31 '17 at 21:45
Jean-François Savard
19.1k55 gold badges4040 silver badges6666 bronze badges
answered Dec 21 '09 at 21:18
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Adding a column to an existing table in a Rails migration
...n to it and then call
rake db:migrate
This will work if you have rails 3.1 onwards installed in your system.
Much simpler way of doing it is change let the change in migration file be as it is.
use
$rake db:migrate:redo
This will roll back the last migration and migrate it again.
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How to find the type of an object in Go?
... "reflect"
)
func main() {
b := true
s := ""
n := 1
f := 1.0
a := []string{"foo", "bar", "baz"}
fmt.Println(reflect.TypeOf(b))
fmt.Println(reflect.TypeOf(s))
fmt.Println(reflect.TypeOf(n))
fmt.Println(reflect.TypeOf(f))
fmt.Println(reflect.TypeOf(a))
}
Pr...
Ruby 2.0.0p0 IRB warning: “DL is deprecated, please use Fiddle”
...ocated this files rbreadline.rb and readline.rb at C:\RailsInstaller\Ruby2.1.0\lib\ruby\site_ruby\2.1.0\ . I changed the line from require 'dl' to require 'fiddle'. No more warnings.
– Blairg23
Jun 19 '15 at 8:53
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