DZone Snippets: check code

Simple way to check command line arguments in a C program

jmftrindade (Joana M. F. da Trindade) — Mon, 25 Feb 2008 22:49:18 GMT

A simple way to check command line arguments.

Author: Joana Matos Fonseca da Trindade
Date: 2008.02.25



#include 

#include 

#include 



/* minimum required number of parameters */

#define MIN_REQUIRED 2



/* display usage */

int help() {

   printf("Usage: myprogram [-s ] [-n ] [-true]\n");

   printf("\t-s: a string a\n");

   printf("\t-n: a number\n");

   printf("\t-true: a single parameter\n");



   return 1;

}



/* main */

int main(int argc, char *argv[]) {

   if (argc < MIN_REQUIRED) {

      return help();

   }

   int i;



   /* iterate over all arguments */

   for (i = 1; i < (argc - 1); i++) {

       if (strcmp("-s", argv[i]) == 0) {

          /* do something with it */ 

          printf("string = %s\n", argv[++i]);

          continue;

       }

       if (strcmp("-n", argv[i]) == 0) {

          /* do something with it. for example, convert it to an integer */

          printf("number = %i\n", atoi(argv[++i]));

          continue;

       }

       if (strcmp("-true", argv[i]) == 0) {

          printf("true activated\n");

          continue;

       }

       return help();

   }

   return 0;

}

PHP : Comprobar e-mail válido / Check valid e-mail

Ricardo (Ricardo m. García) — Mon, 23 Jul 2007 11:11:17 GMT

Comprobar e-mail válido / Check valid e-mail
Código fuente / Source code :



function esEmailValido($email)

{

    if (ereg("^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@([_a-zA-Z0-9-]+\.)*[a-zA-Z0-9-]{2,200}\.[a-zA-Z]{2,6}$", $email ) )

	{

       return true;

    }

	else

	{

       return false;

    }

}

Check email in html form

bublik (Voloshin Ruslan) — Thu, 12 Jul 2007 10:04:11 GMT

// description of your code here

PHP variable check

alexwilliams (Alex Williams) — Wed, 03 Jan 2007 13:09:30 GMT

ugh



$page = isset($_GET['page']) ? $_GET['page'] : 'home';

Is Date //JavaScript Function

jonasraoni (Jonas Raoni Soares Silva) — Thu, 15 Jun 2006 20:12:01 GMT

Checks if a date is valid and returns error codes described bellow.

[UPDATED CODE AND HELP CAN BE FOUND HERE]



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com/geral/is-date [v1.0]



isDate = function(y, m, d){ //v1.0

        if(typeof y == "string" && m instanceof RegExp && d){

            if(!m.test(y)) return 1;

            y = RegExp["$" + d.y], m = RegExp["$" + d.m], d = RegExp["$" + d.d];

        }

        d = Math.abs(d) || 0, m = Math.abs(m) || 0, y = Math.abs(y) || 0;

        return arguments.length != 3 ? 1 : d < 1 || d > 31 ? 2 : m < 1 || m > 12 ? 3 : /4|6|9|11/.test(m) && d == 31 ? 4

        : m == 2 && (d > ((y = !(y % 4) && (y % 1e2) || !(y % 4e2)) ? 29 : 28)) ? 5 + !!y : 0;

};

Usage

Help



isDate(y: Integer, m: Integer, d: Integer): Integer

    Checks a date and returns 0 if it's valid or one of the error codes bellow.

    y year

    m month

    d day



	

isDate(date: String, matcher: RegExp, map: Object): Integer

    Checks a date and returns 0 if it's valid or one of the error codes bellow.

    date date in a string form

    matcher regular expression responsible to find and store the day, month and year

    			

    map object containing the position where each date component is localized inside the regular expression. Its format is the following: {d: positionOfTheDay, m: positionOfTheMonth, y: positionOfTheYear}								

Return codes

    * 0 = Valid date

    * 1 = Date format invalid (regular expression failed or amount of arguments != 3)

    * 2 = Day isn't between 1 and 31

    * 3 = Month isn't between 1 and 12

    * 4 = On April, June, September and November there isn't the day 31

    * 5 = On February the month has only 28 days

    * 6 = Leap year, February has only 29 days

Check the syntax of a bunch of PHP files all at once

yoghoyogho () — Thu, 18 May 2006 00:19:40 GMT

Will find all files ending with 'php' and execute the syntax check of php for every found file. Useful if you quickly want to see which php file contains a parse error.



find ./ -type f -name \*.php -exec php -l {} \;

Thai election ID checking

korakot (Korakot Chaovavanich) — Sun, 19 Mar 2006 16:30:32 GMT

The online service here aims to help people
check where they are to vote. However, it can be
used as ID certification as well.



# nnnn is the id to be checked

http://www.dopa.go.th/cgi-bin/inqelect.sh?pid=nnnn

Here I make it into a function call.



import urllib, re

def getname(id):

  url = 'http://www.dopa.go.th/cgi-bin/inqelect.sh?pid=' + str(id)

  src = urllib.urlopen(url).read()

  pat = '