The very first regex will match one particular whitespace character. The 2nd regex will reluctantly match one or more whitespace figures. For some applications, these two regexes are certainly related, apart from in the second case, the regex can match much more in the string, if it prevents the regex match from failing. from
Employing %s in scanf devoid of an explcit discipline width opens a similar buffer overflow exploit that will get did; specifically, if you can find much more characters from the enter stream in comparison to the target buffer is sized to carry, scanf will Fortunately generate those extra characters to memory outside the house the buffer, most likely clobbering something important. Unfortunately, not like in printf, you can't source the sphere with for a operate time argument:
@Ben Here is an example of outter quotes, recognize that /S does nothing at all in that condition Consider it pastebin.com/Uncooked.
Earn badges by enhancing or inquiring inquiries in Staging Floor. See new badges Exactly what does %s and %d suggest in printf within the C language? [shut]
This is especially crucial for users of our Neighborhood that are newbies, rather than aware of the syntax. On condition that, are you able to edit your answer to include a proof of what you're undertaking and why you suspect it is the greatest tactic?
Those people two replaceAll phone calls will generally produce the exact same consequence, irrespective of what x is. Nonetheless, it's important to notice that the two frequent expressions aren't the same:
Like that it could stand on its own. Giving an example which was similar to the instance during the question would also be a plus.
so "indent" specifies how much Room to allocate to the string that follows it within the parameter checklist.
then the string MY_COMMAND will probably be parsed specifically like it ended up typed for the command prompt. If you take command-line input from your user, or in case you are a library processing a command line provided by an application, which is likely a good suggestion. By way of example, the C runtime library procedure() purpose Middle East Business Awards could be carried out in this manner.
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The width will not be specified in the format string, but as an extra integer worth argument previous the argument that should be formatted.
code that will have to nonetheless pass through a pre-processor. Meaning it might have #include things like and #define among the other macros. It can also be penned as .sx.
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So When you have a sophisticated command which you ought to move to CMD.exe you either have to remember CMD's argument quoting regulations, and effectively escape each of the rates, or use /S, which triggers a special non-parsing rule of "Strip initial and final " and take care of all other figures as the command to execute unchanged".
.S data files are source code information published in assembly. Assembly is an extremely lower-stage method of programming. The files have assembly Recommendations to the processor in sequential order and are typically compiled determined by a particular architecture.
Is there some subtlety to /s that is eluding me? When would it at any time be required? When wouldn't it even make any variance?