That answers the first question. Second question is how would you want to find the nearest node given the input co-ordinates?
From my understanding, this looks like the Finite Element Analysis of a bar. And you might want to use the distance formula (mentioned in post #2) to determine the nearest node.
To open a file, you can use this: open FH, "< /path/to/file";
Use this filehandle 'FH' in a loop to read each line of file.
You are correct about the FEA. My current code looks as followed: (all it dose is output the entire file from above post into my command screen)
And i guess the distance formula would work if it allows me to input a position, and from there it calculates the closest node.
Hi,
I have a set of file names say:
file1
file2
file3
..
filen
I may just do a ls -l or however it works to read this list into an array...
I need to pick the last file name that is "filen" from the list...
your help is greatly appreciated.....hope im clear on my question... (7 Replies)
I am trying to use a script to replace the header of each file, whose filename are stored within the array $test, using the sed command within a Perl script as follows:
$count = 0;
while ( $count < $#test )
{
`sed -e 's/BIOGRF 321/BIOGRF 332/g' ${test} > 0`;
`cat 0 >... (2 Replies)
Hi,
Is there any way I can grep an array against another array?
Basically here's what I need to do.
There will be an array containing some fixed texts and I have to check whether some files contain these lines. Reading the same files over and over again for each different pattern doesnt seem... (1 Reply)
Hi Everyone,
#!/usr/bin/perl
use strict;
use warnings;
my @test=("a;b;qqq;c;d","a;b;ggg;c;d","a;b;qqq;c;d");
would like to split the @test array into two array:
@test1=(("a;b;qqq;c;d","a;b;qqq;c;d"); and @test2=("a;b;ggg;c;d");
means search for 3rd filed.
Thanks
find the... (0 Replies)
I have a list of items in array say @array1=(apple=2,orange=3,peas=15,spinach=50);
Another array has values say @array2=(apple,orange,plums,pineapple);
I need to display a list if @array2 values is present in @array1 .else I need to print of the form(The final o/p may look like this.)
OUTPUT... (5 Replies)
Hi everyone
I have one question about using array in perl. let say I have several log file in one folder.. example
test1.log
test2.log
test3.log
and the list goes on..
how to make an array for this file? It suppose to detect log file in the current directory and all the log file will... (3 Replies)
I have an array and two variables as below,
I need to check if $datevar is present in $filename.
If so, i need to replace $filename with the values in the array.
I need the output inside an ARRAY
How can this be done.
Any help will be appreciated. Thanks in advance. (2 Replies)
Hi all,
Not sure if this should be in the programming forum, but I believe it will get more response under the Shell Programming and Scripting FORUM.
Am trying to write a customized df script in Perl and need some help with regards to using arrays and file handlers.
At the moment am... (3 Replies)
Hi. I have 2 arrays, @result and @comment.
Result contains
1
2
3
and comment contains
a
b
c
my code is below
my @multi = (@result, @comment);
foreach (@multi)
{
print array;
}
For this I am getting result
1
2 (2 Replies)
Discussion started by: sauravrout
2 Replies
LEARN ABOUT PHP
preg_split
PREG_SPLIT(3) 1 PREG_SPLIT(3)preg_split - Split string by a regular expressionSYNOPSIS
array preg_split (string $pattern, string $subject, [int $limit = -1], [int $flags])
DESCRIPTION
Split the given string by a regular expression.
PARAMETERS
o $pattern
- The pattern to search for, as a string.
o $subject
- The input string.
o $limit
- If specified, then only substrings up to $limit are returned with the rest of the string being placed in the last substring. A
$limit of -1, 0 or NULL means "no limit" and, as is standard across PHP, you can use NULL to skip to the $flags parameter.
o $flags
-$flags can be any combination of the following flags (combined with the | bitwise operator):
o PREG_SPLIT_NO_EMPTY - If this flag is set, only non-empty pieces will be returned by preg_split(3).
o PREG_SPLIT_DELIM_CAPTURE - If this flag is set, parenthesized expression in the delimiter pattern will be captured and
returned as well.
o PREG_SPLIT_OFFSET_CAPTURE - If this flag is set, for every occurring match the appendant string offset will also be
returned. Note that this changes the return value in an array where every element is an array consisting of the matched
string at offset 0 and its string offset into $subject at offset 1.
RETURN VALUES
Returns an array containing substrings of $subject split along boundaries matched by $pattern.
EXAMPLES
Example #1
preg_split(3) example : Get the parts of a search string
<?php
// split the phrase by any number of commas or space characters,
// which include " ",
, ,
and f
$keywords = preg_split("/[s,]+/", "hypertext language, programming");
print_r($keywords);
?>
The above example will output:
Array
(
[0] => hypertext
[1] => language
[2] => programming
)
Example #2
Splitting a string into component characters
<?php
$str = 'string';
$chars = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);
print_r($chars);
?>
The above example will output:
Array
(
[0] => s
[1] => t
[2] => r
[3] => i
[4] => n
[5] => g
)
Example #3
Splitting a string into matches and their offsets
<?php
$str = 'hypertext language programming';
$chars = preg_split('/ /', $str, -1, PREG_SPLIT_OFFSET_CAPTURE);
print_r($chars);
?>
The above example will output:
Array
(
[0] => Array
(
[0] => hypertext
[1] => 0
)
[1] => Array
(
[0] => language
[1] => 10
)
[2] => Array
(
[0] => programming
[1] => 19
)
)
NOTES
Tip
If you don't need the power of regular expressions, you can choose faster (albeit simpler) alternatives like explode(3) or
str_split(3).
Tip
If matching fails, an array with a single element containing the input string will be returned.
SEE ALSO
PCRE Patterns, preg_quote(3), implode(3), preg_match(3), preg_match_all(3), preg_replace(3), preg_last_error(3).
PHP Documentation Group PREG_SPLIT(3)