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Draw in Canvas by finger, Android
...ngth - 1);
int i = (int)p;
p -= i;
// now p is just the fractional part [0...1) and i is the index
int c0 = colors[i];
int c1 = colors[i+1];
int a = ave(Color.alpha(c0), Color.alpha(c1), p);
int r = ave(Color.red(c0...
efficient circular buffer?
...s defined. O(n) is understandable when the deque can grow to infinity, but if maxlen is given, indexing an element should be constant time.
– lvella
Nov 13 '15 at 21:57
1
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How to HTML encode/escape a string? Is there a built-in?
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Now that would be silly. I don't care much if it gets escaped or not. I'm just noting it's not required per the html specs.
– kch
Mar 28 '09 at 15:20
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Invalid argument supplied for foreach()
...able to remove the other two classes, @Kris. They both extend Traversable now and seem to have been born that way in 5.0.0. Though I'm feeling a tiny doubt as to whether instanceof always applied to extends.
– Bob Stein
Mar 8 '14 at 10:44
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warning about too many open figures
...her plots.
plt.close() closes a window, which will be the current window, if not specified otherwise. plt.close('all') will close all open figures.
The reason that del fig does not work is that the pyplot state-machine keeps a reference to the figure around (as it must if it is going to know what ...
Vibrate and Sound defaults on notification
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The vibration now has a delay of 1000 ms. If you set the first one to 0, it will go off instantly. It's a { delay, vibrate, sleep, vibrate, sleep } pattern.
– Tom
Apr 30 '15 at 11:22
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Which @NotNull Java annotation should I use?
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package javax.annotation;
@TypeQualifierNickname
@Nonnull(when = When.UNKNOWN)
@Retention(RUNTIME)
public @interface Nullable {}
package org.checkerframework.checker.nullness.qual;
@Retention(RUNTIME)
@Target({TYPE_USE, TYPE_PARAMETER})
@SubtypeOf({})
@ImplicitFor(
literals = {LiteralKind....
How do I concatenate or merge arrays in Swift?
If there are two arrays created in swift like this:
12 Answers
12
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Getting the name of a child class in the parent class (static context)
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You don't need to wait for PHP 5.3 if you're able to conceive of a way to do this outside of a static context. In php 5.2.9, in a non-static method of the parent class, you can do:
get_class($this);
and it will return the name of the child class as a strin...
Creating anonymous objects in php
As we know, creating anonymous objects in JavaScript is easy, like the code below:
12 Answers
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