The 1st regex will match one whitespace character. The next regex will reluctantly match a number of whitespace figures. For the majority of needs, both of these regexes are very equivalent, besides in the next circumstance, the regex can match far more on the string, if it prevents the regex match from failing. from
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If you always use /S, you can forget about the exception and just remember the "usual" situation. The draw back is the fact cmd.
Windows, which derives finally from CP/M and VAX, will not use This technique internally. To your running technique, the command line is just a single string of people.
And since your 2nd parameter is empty string "", there's no difference between the output of two instances.
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And components resources at any stage even in the course of application execution subsequently simply call process calls which call I/O routines coded in assembly language.
See also that I am using a tuple listed here at the same time (any time you have only one string employing a tuple is optional) As an example that several strings is often inserted and formatted in one assertion.
All device dependent code is prepared in assembly language.The assembly language differs for various processors.
An assembly language is unique to a specific Laptop or computer architecture, in contrast to most higher-stage programming languages, which may be more transportable.
What I do not comprehend is when the estimate removal would crack everything, for the reason that that is the only time /s ("suppress the default quote-removal conduct") might be necessary. It only removes rates underneath a specific arcane list of disorders, and one of those situations would be that the initial character after the /c must be a quotation mark.
@barlop, The purpose of /S is that if you do not know check here ahead of time if the command has embedded offers or not. If you'll find just two offers about the command line it can be addressed in a different way by default if you will discover accurately two quote characters than if there are actually additional or much less. /S can make it be addressed precisely the same. It truly is documented: Just sort "assist cmd" over the command line.
Andrew HareAndrew Hare 351k7575 gold badges644644 silver badges640640 bronze badges three 15 Observe that this kind of string interpolation is deprecated in favor of the greater impressive str.structure system.
So Should you have an advanced command which you would like to move to CMD.exe you both have to keep in mind CMD's argument quoting rules, and effectively escape most of the quotes, or use /S, which triggers a special non-parsing rule of "Strip initially and previous " and treat all other people since the command to execute unchanged".
.S information are source code files prepared in assembly. Assembly is an especially reduced-level form of programming. The data files include assembly instructions to the processor in sequential get and are generally compiled according to a particular architecture.
effect of /S is usually to override this 1 exception, so which the two quotation characters remain removed in that situation.