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Top Forums Shell Programming and Scripting Delete blank lines from a file Post 302446403 by durden_tyler on Wednesday 18th of August 2010 02:15:16 PM
Old 08-18-2010
Quote:
Originally Posted by Damon_Qu
...So I want to delete the blank lines from the file firstly and then use diff to compare them. But I dont know how to delete the blank lines from the files....
You can use sed for that.

Code:
sed '/^$/d' your_file > new_file
mv new_file your_file

tyler_durden
 

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XDIFF_FILE_DIFF_BINARY(3)						 1						 XDIFF_FILE_DIFF_BINARY(3)

xdiff_file_diff_binary - Alias of xdiff_file_bdiff

SYNOPSIS
bool xdiff_file_diff_binary (string $old_file, string $new_file, string $dest) DESCRIPTION
Makes a binary diff of two files and stores the result in a patch file. This function works with both text and binary files. Resulting patch file can be later applied using xdiff_file_bpatch(3). Starting with version 1.5.0 this function is an alias of xdiff_file_bdiff(3). PARAMETERS
o $old_file - Path to the first file. This file acts as "old" file. o $new_file - Path to the second file. This file acts as "new" file. o $dest - Path of the resulting patch file. Resulting file contains differences between "old" and "new" files. It is in binary format and is human-unreadable. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 xdiff_file_diff_binary(3) example The following code makes binary diff of two archives. <?php $old_version = 'my_script_1.0.tgz'; $new_version = 'my_script_1.1.tgz'; xdiff_file_diff_binary($old_version, $new_version, 'my_script.bdiff'); ?> NOTES
Note Both files will be loaded into memory so ensure that your memory_limit is set high enough. SEE ALSO
xdiff_file_bdiff(3), xdiff_file_bpatch(3). PHP Documentation Group XDIFF_FILE_DIFF_BINARY(3)
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