The very first regex will match 1 whitespace character. The 2nd regex will reluctantly match a number of whitespace characters. For most applications, both of these regexes are quite equivalent, except in the next case, the regex can match more of your string, if it stops the regex match from failing. from
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@Ben Here is an illustration of outter rates, discover that /S does very little in that circumstance Check out it pastebin.com/raw.
Receive badges by increasing or inquiring inquiries in Staging Ground. See new badges What does %s and %d imply in printf within the C language? [shut]
char character; // simply a char one letter/from the ascii map character = 'a'; // assign 'a' to character
The primary difference lies in just how it get's managed. When you would've a group of (one example is) 3 spaces instantly adhering to one another s+ normally takes that group and turns The complete it right into a "", though s would proces every single Place By itself.
The %s token allows me to insert (and potentially structure) a string. See the %s token is replaced by no matter what I pass towards the string once the % image.
The main just one matches just one whitespace, Whilst the second just one matches a single or lots of whitespaces. They're the so-termed typical expression quantifiers, they usually complete matches similar to this (taken through the documentation):
@MichaelBurr: I'm very absolutely sure he just essential the extra set of estimates; the /s was redundant in this case, since the circumstances under which /s would make a big difference were not met.
An assembly language is unique to a specific computer architecture, in distinction to most significant-stage programming languages, which may be much more read more moveable.
Its because equipment dependent stuff and early initialization including establishing cache and memory can only be done with assembly stage Guidelines including I/O instructions.
The kernel doesn't have the luxury on the libc library to deal with the Original setup of various assets.
So the arguments expected by C, have to be hacked up by the C runtime library. The operating system only materials one string While using the arguments in, and In case your language isn't C (or even whether it is) it will not be interpreted as Area-separated arguments quoted In keeping with shell procedures, but as a thing fully distinct.
So Should you have an advanced command which you need to pass to CMD.exe you either have to recollect CMD's argument quoting principles, and appropriately escape the entire quotes, or use /S, which triggers a Unique non-parsing rule of "Strip initial and final " and deal with all other characters because the command to execute unchanged".
This might be additional very likely to be attractive within the situation inside the concern Michael Burr connected to, the place cmd.exe is currently being introduced by CreateProcess as an alternative to from a batch file or maybe the command line by itself..
exe arg1 arg2 on the program; so it looks like opting away from quote removal making use of /s would in fact split points. (In precise fact, nonetheless, it does not break items: cmd /s /c "foo.exe arg1 arg2" performs just high-quality.)