Re: Is there a d analog of strncmp?

[cy via Digitalmars-d-learn]

import std.algorithm.searching: startsWith, commonPrefix;
if(s1.startsWith(s2)) {...}
string prefix = commonPrefix(s1,s2);

Re: Is there a d analog of strncmp?

[dan via Digitalmars-d-learn]

On Monday, 22 August 2016 at 01:45:02 UTC, Jonathan M Davis wrote:
On Monday, August 22, 2016 00:14:31 Adam D. Ruppe via 
Digitalmars-d-learn wrote:

int strncmp(string a, string b, int n) {
  if(a.length > n)
  a = a[0 .. n];
  if(b.length > n)
  b = b[0 .. n];
  import std.algorithm.comparison : cmp;
  return cmp(a, b);
}


Aside from the imports, it can be turned into a one-liner if 
you use take:


return cmp(take(a, n), take(b, n));

- Jonathan M Davis


Thanks Adam and Jonathan for your solutions.

For reference, one of the imports Jonathan is referring to is
   import std.range;

I did not know about take.  Well, i also did not know about cmp.  
So my code is probably not very idiomatic.  But i do appreciate 
all of you d-learn people!

Re: Is there a d analog of strncmp?

[Jonathan M Davis via Digitalmars-d-learn]

On Monday, August 22, 2016 00:14:31 Adam D. Ruppe via Digitalmars-d-learn 
wrote:
> int strncmp(string a, string b, int n) {
>   if(a.length > n)
>   a = a[0 .. n];
>   if(b.length > n)
>   b = b[0 .. n];
>   import std.algorithm.comparison : cmp;
>   return cmp(a, b);
> }

Aside from the imports, it can be turned into a one-liner if you use take:

return cmp(take(a, n), take(b, n));

- Jonathan M Davis

Re: Is there a d analog of strncmp?

[Adam D. Ruppe via Digitalmars-d-learn]

int strncmp(string a, string b, int n) {
if(a.length > n)
a = a[0 .. n];
if(b.length > n)
b = b[0 .. n];
import std.algorithm.comparison : cmp;
return cmp(a, b);
}