The first regex will match one whitespace character. The 2nd regex will reluctantly match a number of whitespace characters. For most needs, both of these regexes are very similar, apart from in the second case, the regex can match more on the string, if it prevents the regex match from failing. from
Working with %s in scanf devoid of an explcit field width opens the same buffer overflow exploit that receives did; namely, if you'll find extra people inside the input stream when compared to the target buffer is sized to hold, scanf will happily generate those added figures to memory exterior the buffer, most likely clobbering a little something significant. Sadly, not like in printf, You cannot provide the field with like a run time argument:
@Ben Here is an example of outter quotes, see that /S does very little in that problem Try it pastebin.com/Uncooked.
Home windows, which derives ultimately from CP/M and VAX, isn't going to use This technique internally. On the functioning process, the command line is just a single string of people.
This is very critical for associates of our Neighborhood who're rookies, instead of knowledgeable about the syntax. Given that, are you able to edit your reply to include an explanation of what you're accomplishing and why you suspect it is the greatest tactic?
Why would be the deletion ungrammatical in "I such as the Female [who is] the prettiest in my class" but grammatical in other sentences?
That way it could stand on its own. Furnishing an illustration that was such as the example within the dilemma would also be a plus.
Notice also that I am utilizing a tuple below as well (after you only have one particular string utilizing a tuple is optional) to illustrate that a number of strings may be inserted and formatted in a single statement.
This is quite conventional error-examining code for your Python script that accepts command-line arguments.
five @powersource97, %.*s means you happen to be studying the precision worth from an argument, and precision is the utmost amount of characters to become printed, and %*s you are looking through the width price from an argument, which is the minimal range os figures to get printed.
Its since machine dependent things and early initialization like establishing cache and memory can only be done with assembly stage Guidelines like I/O instructions.
@barlop, the point of /S is if you do not know beforehand if the command has embedded rates or not. If you can find just two rates within the command line it's treated differently by default if there are get more info accurately two estimate characters than if there are actually additional or fewer. /S can make it be taken care of exactly the same. It's documented: Just form "support cmd" around the command line.
First off you might want to know that final output of both the statements will probably be same i.e. to remove many of the spaces from specified string.
So Exactly what does /S Provide you with more? Predominantly it will save you from acquiring to worry about quoting the quotes. Furthermore, it helps in which you are unsure whether for example an environtment variable contains estimate characters. Just say /S and place an additional quotation at first and close.
This is most likely additional prone to be appealing while in the scenario inside the concern Michael Burr linked to, the place cmd.exe is getting launched by CreateProcess as an alternative to from the batch file or the command line by itself..
Is there some subtlety to /s which is eluding me? When wouldn't it at any time be necessary? When would it not even make any change?