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Groups > comp.os.linux.advocacy > #465361

Re: The substantiation that -highhorse asked for

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DFS <nospam@nospam.com> wrote:
> 
> import random
> 
> print "Group 1: r<0"
> print "Group 2: r==0"
> print "Group 3: r>0 && r<=10"
> print "Group 4: r>10 && r<=100"
> print "Group 5: r>100 && r<=1000"
> print "Group 6: r>1000 && r<=10000"
> print "Group 7: r>10000 && r<=100000"
> print "Group 8: r>100000 && r<=1000000"
> print "Group 9: r>1000000"
> 
> def printgroup(grp):
>        print "Found random number " + str(r) + " in Group " + str(grp)
> 
> for j in range(20):
>        r = random.randint(-1000,1001)
>        if r < 0:               printgroup(1); exit
>        if r > 1000000: printgroup(9); exit
>        comps = 
> [(-1,0),(1,10),(11,100),(101,1000),(1001,10000),(10001,100000),(100001,1000000)]
>        for i, x in enumerate(range(len(comps))):
>                if r > comps[i][0] and r <= comps[i][1]: printgroup(i+2); exit
>                i+=1    
> 
> 
> 
> That's 3 if-then-exits to handle 9 comparisons

If you call that 3 ifs, then I get to call this zero ifs:

anon@lowtide:~/code/ifs$ cat goo.c
#include <stdio.h>
#include <stdlib.h>

void flz(void){printf("a<0\n");}
void fgm(void){printf("a>1000000\n");}
void f0(void){printf("a==0\n");}
void f1(void){printf("a>0 && a<=10\n");}
void f2(void){printf("a>10 && a<=100\n");}
void f3(void){printf("a>100 && a<=1000\n");}
void f4(void){printf("a>1000 && a<=10000\n");}
void f5(void){printf("a>10000 && a<=100000\n");}
void f6(void){printf("a>100000 && a<=1000000\n");}

int main(int argc, char *argv[])
{
   int a=0;
   int i=0;
   void (*fp[1000001])(void)={0};
   fp[0]=f0;
   for(i=1;i<=10;i++) fp[i]=f1; 
   for(i=11;i<=100;i++) fp[i]=f2;
   for(i=101;i<=1000;i++) fp[i]=f3;
   for(i=1001;i<=10000;i++) fp[i]=f4;
   for(i=10001;i<=100000;i++) fp[i]=f5;
   for(i=100001;i<=1000000;i++) fp[i]=f6;
   a=atoi(argv[1]);
   (a<0?flz:a>1000000?fgm:fp[a])();  
   return 0;
}
anon@lowtide:~/code/ifs$ 

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Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-08-28 08:28 -0400
  Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-28 09:20 -0700
    Re: The substantiation that -highhorse asked for fr314159@gmail.com - 2018-08-28 11:27 -0700
      Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-28 11:39 -0700
      Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-08-29 09:46 -0400
    Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-08-28 14:52 -0400
      Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-28 12:20 -0700
  Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-28 17:21 +0000
    Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-08-28 14:46 -0400
      Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-28 19:14 +0000
        Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-28 12:30 -0700
          Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-28 20:09 +0000
            Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-28 13:58 -0700
              Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-28 21:16 +0000
                Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-28 14:31 -0700
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-28 21:43 +0000
                Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-28 15:06 -0700
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-28 22:26 +0000
                Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-28 15:35 -0700
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-28 23:14 +0000
                Re: The substantiation that -highhorse asked for Snit <usenet@gallopinginsanity.com> - 2018-08-28 14:57 -0700
            Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-08-28 23:11 -0400
              Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-29 06:14 +0000
                Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-08-29 09:34 -0400
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-29 14:31 +0000
                Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-29 11:01 -0700
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-31 12:33 +0000
                Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-31 09:16 -0700
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-31 16:53 +0000
                Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-31 10:22 -0700
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-31 17:53 +0000
                Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-08-31 11:36 -0700
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-09-01 13:45 +0000
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-09-01 13:59 +0000
                Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-09-01 08:15 -0700
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-09-01 16:00 +0000
                Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-09-01 11:20 -0700
                Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-08-31 15:00 -0400
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-31 19:40 +0000
                Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-09-01 10:15 -0400
                Re: The substantiation that -highhorse asked for Steve Carroll <fretwizzer@gmail.com> - 2018-09-01 08:22 -0700
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-09-01 16:28 +0000
                Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-09-01 16:39 -0400
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-09-01 22:00 +0000
                Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-09-01 18:27 -0400
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-09-01 22:40 +0000
                Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-09-01 19:09 -0400
                Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-09-01 23:59 +0000
        Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-08-28 23:01 -0400
          Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-29 06:26 +0000
  Re: The substantiation that -highhorse asked for "F. Russell" <fr@random.info> - 2018-08-28 19:25 +0000
    Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-08-29 09:32 -0400
      Re: The substantiation that -highhorse asked for fr314159@gmail.com - 2018-08-29 06:46 -0700
        Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-08-29 09:55 -0400
          Re: The substantiation that -highhorse asked for fr314159@gmail.com - 2018-08-29 08:02 -0700
            Re: The substantiation that -highhorse asked for DFS <nospam@nospam.com> - 2018-09-01 10:14 -0400
          Re: The substantiation that -highhorse asked for owl <owl@rooftop.invalid> - 2018-08-29 15:12 +0000

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