schwern

test=> select count(*) from orders;
  count  
---------
 1003116
(1 row)

test=> select count(distinct articleid) from orders;
 count  
--------
 999921

schwern

package permutation

// Based on https://stackoverflow.com/a/30230552/14660 by Paul Hankin

// perm := NewPermutation( slice )
// for next := perm.Next(); next != nil; next = perm.Next() {
//    ...
// }
//
// or

schwern

    for i, j := 0, len(r)-1;
        i < len(r)/2;
        i, j = i+1, j-1
    {
        r[i], r[j] = r[j], r[i]
    }
    
    for i, j := 0, len(r)-1;
        i < len(r)/2;
        i, j = i+1, j-1 {

schwern

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>

char * strcat_ex( const char *s, ... )
{    
    if ( s == NULL ) {
        return NULL;
    }

schwern

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int read_line_fgetc(FILE *fp, char *line, int line_size){
    int c;
    int i = 0;
    while( (c = fgetc(fp)) > 0) {
        if( (char)c == '\n' ) {
            break;

schwern

/* See http://www.pcg-random.org/using-pcg-c-basic.html */
#include "pcg_basic.h"
#include <stdio.h>

void try_random(unsigned int seed, int initseq) {
    pcg32_random_t rng;

    pcg32_srandom_r(&rng, seed, initseq);
    printf("Seed: %u\n", seed);
    

schwern

t = Process.clock_gettime(Process::CLOCK_MONOTONIC);
puts "%10.10f" % t.prev_float;    # 391942.2739719209
puts "%10.10f" % t;               # 391942.2739719210
puts "%10.10f" % t.next_float;    # 391942.2739719211

schwern

#include <stdio.h>

typedef struct date_t {
    int year; int month; int day;
} date_t;

#define EPOCH 1970

void date_convert(date_t* date, unsigned int days) {
    int year = EPOCH, mo = 0, day = 1;

schwern

#include <time.h>
#include <stdio.h>
#include <unistd.h>

#ifdef __MACH__
#include <mach/mach_time.h>
#define CLOCK_REALTIME 0
#define CLOCK_MONOTONIC 0
int clock_gettime(int clk_id, struct timespec *t){
    mach_timebase_info_data_t timebase;

schwern

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