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What's the (hidden) cost of Scala's lazy val?
...uivalent to the following Java code:
class LazyTest {
public int bitmap$0;
private String msg;
public String msg() {
if ((bitmap$0 & 1) == 0) {
synchronized (this) {
if ((bitmap$0 & 1) == 0) {
synchronized (this) {
msg = "La...
Fast Bitmap Blur For Android SDK
... I'm looping through the pixels of an image to blur it. This takes about 30 seconds on a 640x480 image.
19 Answers
...
Split (explode) pandas dataframe string entry to separate rows
... for _, row in a.iterrows()]).reset_index()
Out[55]:
index 0
0 a 1
1 b 1
2 c 1
3 d 2
4 e 2
5 f 2
Then you just have to rename the columns
share
|
impr...
How to check if a number is a power of 2
...his problem:
bool IsPowerOfTwo(ulong x)
{
return (x & (x - 1)) == 0;
}
Note, this function will report true for 0, which is not a power of 2. If you want to exclude that, here's how:
bool IsPowerOfTwo(ulong x)
{
return (x != 0) && ((x & (x - 1)) == 0);
}
Explanation
Fi...
How do you detect Credit card type based on number?
...
+50
The credit/debit card number is referred to as a PAN, or Primary Account Number. The first six digits of the PAN are taken from the I...
How do I base64 encode (decode) in C?
...
106
Here's the one I'm using:
#include <stdint.h>
#include <stdlib.h>
static char en...
Why do Lua arrays(tables) start at 1 instead of 0?
...
Although I too found them weird at the beginning, I have learned to love 0-based arrays. But I get by OK with Lua's 1-based arrays, especially by
using Lua's generic for loop and the ipairs operator—I can usually avoid worrying about just how arrays are indexed.
...
Generate random number between two numbers in JavaScript
...|
edited Jun 12 '19 at 12:06
Luca Fagioli
9,56333 gold badges4343 silver badges4040 bronze badges
answer...
initialize a numpy array
...
answered Dec 26 '10 at 20:56
KatrielKatriel
102k1717 gold badges120120 silver badges157157 bronze badges
...
Clojure 1.2.1/1.3/1.4 'proxy generated in Grails 2.0.0 runtime fails. 1.2.0 is fine
I'm working on extending the Grails Clojure plugin in Grails 2.0.0 (and 2.1.0-SNAPSHOT) and I wanted to update it to Clojure 1.3.0 and add clojure.tools.logging .
...