I have a list of items in 2 files. Some items are present in both the files in any order. Say for example item name is 'apple', it may be present in line 2 of file 1 and line 10 of file 2.
I want to see the missing items only. In simple terms, Items present in file1 if not in file2 then output the missing items to another file as "<itemname> not in file2.
thanks
Two ways in perl:
Personally, I prefer methods like these over sort because they can process millions and millions of records in both files very fast passing through each set only once.
I have file1 and file2:
file1:
11 xxx kksd ...
22 kkk kdsglg...
33 sss kdfjdksa...
44 kdsf dskjfkas ...
hh kdkf kdkkd..
jg dkf dfkdk ...
...
file2:
jg
22
hh
...
I need to check each line of file1. if the field one is in file2, I will keep it; if not, the whole line will be... (17 Replies)
I have searched about 30 threads, a load of Google pages and cannot find what I am looking for. I have some of the parts but not the whole. I cannot seem to get the puzzle fit together.
I have three folders, two of which contain different versions of multiple files, dist/file1.php dist/file2.php... (4 Replies)
Hi, all:
I've got two folders, say, "folder1" and "folder2".
Under each, there are thousands of files.
It's quite obvious that there are some files missing in each. I just would like to find them. I believe this can be done by "diff" command.
However, if I change the above question a... (1 Reply)
I have four files, I need to compare these files together.
As such i know "sdiff and comm" commands but these commands compare 2 files together. If I use sdiff command then i have to compare each file with other which will increase the codes.
Please suggest if you know some commands whcih can... (6 Replies)
Please help me with awk.I have two files with the below details
file1
123456789 2012
987654321 2011
a1234567892012
a1234abcde2012
b1234567892012
c1234567892012
98765a12342012
file2
a1234
01234
b1234
33333
I need to check whether the items in file2 is present in file1 .If it is... (2 Replies)
I want to compare two files, and search for items that are in both. Then override the first file with that containing only elements which were in both files. I imagine something with diff, but not sure.
File 1
One
Two
Three
Four
Five
File 2
One
Three
Four
Six
Eight (2 Replies)
I have this code
awk 'NR==FNR{a=$1;next} a' file1 file2
which does what I need it to do, but for only two files. I want to make it so that I can have multiple files (for example 30) and the code will return only the items that are in every single one of those files and ignore the ones... (7 Replies)
hi all,
Thanks to all for your great help...
I have a scenario that I have two files (file1 & file2). I need to compare two files entire row by row and share the output if any discrepancies within two files.
File1:
DB1|TB1|C1,C3
DB2|TB2|C1,C2
DB3|TB3|C1,C2,C3,C4
File2:
... (2 Replies)
Discussion started by: Selva_2507
2 Replies
LEARN ABOUT PHP
array_flip
ARRAY_FLIP(3) 1 ARRAY_FLIP(3)array_flip - Exchanges all keys with their associated values in an arraySYNOPSIS
array array_flip (array $array)
DESCRIPTION array_flip(3) returns an array in flip order, i.e. keys from $array become values and values from $array become keys.
Note that the values of $array need to be valid keys, i.e. they need to be either integer or string. A warning will be emitted if a value
has the wrong type, and the key/value pair in question will not be included in the result.
If a value has several occurrences, the latest key will be used as its value, and all others will be lost.
PARAMETERS
o $array
- An array of key/value pairs to be flipped.
RETURN VALUES
Returns the flipped array on success and NULL on failure.
EXAMPLES
Example #1
array_flip(3) example
<?php
$input = array("oranges", "apples", "pears");
$flipped = array_flip($input);
print_r($flipped);
?>
The above example will output:
Array
(
[oranges] => 0
[apples] => 1
[pears] => 2
)
Example #2
array_flip(3) example : collision
<?php
$input = array("a" => 1, "b" => 1, "c" => 2);
$flipped = array_flip($input);
print_r($flipped);
?>
The above example will output:
Array
(
[1] => b
[2] => c
)
SEE ALSO array_values(3), array_keys(3), array_reverse(3).
PHP Documentation Group ARRAY_FLIP(3)