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Top Forums Programming Merge two strings by overlapped region Post 302895671 by Corona688 on Tuesday 1st of April 2014 05:53:45 PM
Old 04-01-2014
1) Simplest thing in the world:

Code:
const char *str1 = argv[1];
const char *str2 = argv[2];

The limitation of this, of course, is that it's just pointer pointing to the same memory as argv[1]. That doesn't matter since argv[1] isn't going to change and str1 won't be edited.

They are 'const' so that you can't edit them by accident, it'd be a compiler error (or a lot of intentional typecasting) to try. Any string parameters your functions take which don't get edited should be 'const' too, to signify this. For example:

Code:
STRCPY(3)                  Linux Programmer's Manual                 STRCPY(3)



NAME
       strcpy, strncpy - copy a string

SYNOPSIS
       #include <string.h>

       char *strcpy(char *dest, const char *src);

'src' for strcpy will accept both constant and non-constant strings because of this, but if you try to put a constant string into 'dest', it will cause a compiler error. This is better than a crash later.
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GEOIP_REGION_BY_NAME(3) 						 1						   GEOIP_REGION_BY_NAME(3)

geoip_region_by_name - Get the country code and region

SYNOPSIS
array geoip_region_by_name (string $hostname) DESCRIPTION
The geoip_region_by_name(3) function will return the country and region corresponding to a hostname or an IP address. This function is currently only available to users who have bought a commercial GeoIP Region Edition. A warning will be issued if the proper database cannot be located. The names of the different keys of the returning associative array are as follows: o "country_code" -- Two letter country code (see geoip_country_code_by_name(3)) o "region" -- The region code (ex: CA for California) PARAMETERS
o $hostname - The hostname or IP address whose region is to be looked-up. RETURN VALUES
Returns the associative array on success, or FALSE if the address cannot be found in the database. EXAMPLES
Example #1 A geoip_region_by_name(3) example This will print the array containing the country code and region of the host example.com. <?php $region = geoip_region_by_name('www.example.com'); if ($region) { print_r($region); } ?> The above example will output: Array ( [country_code] => US [region] => CA ) PHP Documentation Group GEOIP_REGION_BY_NAME(3)
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