After much research and tinkering I have finally managed to achieve a solution to this problem. Please accept my apologies for not posting links to the original references – there are many and I wasn’t taking notes – but this one was certainly useful. My solution uses a filtering XMLStreamWriter which applies an empty namespace … Read more
Well, you could do it using preg_grep(): $output = preg_grep(‘!^car_!’, $array); You could use array_filter() too but you have to pass a test function into that.
An elegant way to prefix array values (PHP 5.3+): $prefixed_array = preg_filter(‘/^/’, ‘prefix_’, $array); Additionally, this is more than three times faster than a foreach.
You said POSIX shells which would include BASH, Kornshell, Ash, Zsh, and Dash. Fortunately, all of these shells do pattern filtering on variable values. Patterns are what you use when you specify files with things like * on the Unix/Linux command line: $ ls *.sh # Lists all files with a `.sh` suffix These POSIX … Read more
Never rewrite what is provided to you: os.path.commonprefix does exactly this: Return the longest path prefix (taken character-by-character) that is a prefix of all paths in list. If list is empty, return the empty string (”). Note that this may return invalid paths because it works a character at a time. For comparison to the … Read more
You could use the rename(1) command: rename ‘s/(.*)$/new.$1/’ original.filename Edit: If rename isn’t available and you have to rename more than one file, shell scripting can really be short and simple for this. For example, to rename all *.jpg to prefix_*.jpg in the current directory: for filename in *.jpg; do mv “$filename” “prefix_${filename}”; done; or … Read more
Because \ begin escape sequences only when they are valid escape sequences. >>> ‘\n’ ‘\n’ >>> r’\n’ ‘\\n’ >>> print ‘\n’ >>> print r’\n’ \n >>> ‘\s’ ‘\\s’ >>> r’\s’ ‘\\s’ >>> print ‘\s’ \s >>> print r’\s’ \s Unless an ‘r’ or ‘R’ prefix is present, escape sequences in strings are interpreted according to … Read more