Cropping string using reqex match

Question

I need to use a crippled tool that provides no way to trim leading spaces from a string. It has a .NET-style regular expression, but only Match is implemented, not replaced. So, I have come (surprise yourself) with this regular expression, which seems to work .. but I do not quite understand why it works : -)

$trimmed = regex/[^ ].*[^ ]/ ($original_string)

Why does this work, does it really work in all cases, and is there a better way if you only have a regular match (even group matches cannot be captured :()?

Answer 1

It should work fine if only one character is not surrounded by a space.

:

• [^ ]
• , ( ) .*
• [^ ]

, (1 3), .

\b [^ ], " ", :

\b.*\b

Answer 2

: [^ ] , .* -, [^ ] . , , $original_string.

, , . , (. \b ).