D Documentation  
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  1. Introduction
    1. A simple tutorial
    2. Switching to D
    3. An advanced tutorial
  2. Language Reference
    1. General syntax
    2. Statements
    3. Types
    4. Error Handling
    5. Memory Management
  3. Std. runtime library (Phobos)
    1. std.base64
    2. std.boxer
    3. std.compiler
    4. std.conv
    5. std.ctype
    6. std.date
    7. std.file
    8. std.format
    9. std.gc
    10. std.intrinsic
    11. std.math
    12. std.md5
    13. std.mmfile
    14. std.outbuffer
    15. std.path
    16. std.process
    17. std.random
    18. std.recls
    19. std.regexp
      1. find
      2. rfind
      3. search
      4. split
      5. sub
      6. Regexp.replace
    20. std.socket
    21. std.socketstream
    22. std.stdint
    23. std.stdio
    24. std.stream
    25. std.string
    26. std.system
    27. std.thread
    28. std.uri
    29. std.utf
    30. std.zip
    31. std.zlib
  4. Libraries and Tools
    1. mango
    2. Build
  5. Related Links
  6. About this documentation
find 
int find(rchar[] string, char[] pattern, char[] attributes = null)

Search string for the first match with pattern with attributes. Returns the index in string of the match if found, -1 if no match.

Example:
import std.stdio;
import std.regexp;

int main() {
  // find the index of the first word that contains the letter n
  char[] str = "Regular expressions can be fun!";
  int index = find(str,"[a-z]*n[a-z]*","i"); // ignore case
  writefln("Index: %d",index);

  // determine if the string contains an integer
  index = find(str,"-?[0-9]+");
  if(index == -1) {
    writefln("No integers found.");
  }
  return 0;
}

Output:
Index: 8
No integers found.
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