find_pair - Linux
Overview
find_pair searches through a collection of elements and identifies pairs of them that meet a specified condition. It is particularly useful for performing pattern matching, finding duplicate items, or identifying related data points.
Syntax
find_pair [--element-separator=<char>] [--line-separator=<char>] [--condition=<condition>] <input-file>
Options/Flags
- –element-separator=
: Specify the character that separates elements within a line. Default: space. - –line-separator=
: Specify the character that separates lines in the input file. Default: newline. - –condition=
: Specify a logical expression to determine if a pair of elements meets the matching condition. Default: equality of elements.
Examples
- Find pairs of duplicate lines in a file:
find_pair /path/to/file.txt
- Find pairs of strings that differ by a single character:
find_pair --condition='len(a) == len(b) and sum(a != b) == 1' input.txt
- Find pairs of lines containing specific keywords:
find_pair --condition='"keyword1" in a and "keyword2" in b' file1.txt file2.txt
Common Issues
- Input files should be consistent and follow the specified separators for correct parsing.
- The condition expression must be valid Python syntax.
Integration
find_pair can be integrated with other Linux commands for advanced tasks:
- Find duplicate files:
find_pair --element-separator='\n' /path/to/dir | sort | uniq - Identify pairs of similar images:
find_pair --condition='compare_images(a, b) > 0.9' images.zip