大约有 44,000 项符合查询结果（耗时：0.0698秒） [XML]
How to negate a method reference predicate
...w that shows how by explicitly casting the method reference to a Predicate and then converting it using the negate function. That is one way among a few other not too troublesome ways to do it.
The opposite of this:
Stream<String> s = ...;
int emptyStrings = s.filter(String::isEmpty).count()...
Shell command to sum integers, one per line?
I am looking for a command that will accept (as input) multiple lines of text, each line containing a single integer, and output the sum of these integers.
...
How to use java.String.format in Scala?
...d know how it should display the string. %s is probably the most common, and it just means that the argument should be treated as a string.
I won't list every option, but I'll give a few examples just to give you an idea:
// we can specify the # of decimals we want to show for a floating point:
...
How to ignore whitespace in a regular expression subject string?
...nt "c ats" or "ca ts" to match. I can't strip out the whitespace beforehand because I need to find the begin and end index of the match (including any whitespace) in order to highlight that match and any whitespace needs to be there for formatting purposes.
...
Find the nth occurrence of substring in a string
This seems like it should be pretty trivial, but I am new at Python and want to do it the most Pythonic way.
21 Answers
...
How to output only captured groups with sed?
...as well as specifying what you do want.
string='This is a sample 123 text and some 987 numbers'
echo "$string" | sed -rn 's/[^[:digit:]]*([[:digit:]]+)[^[:digit:]]+([[:digit:]]+)[^[:digit:]]*/\1 \2/p'
This says:
don't default to printing each line (-n)
exclude zero or more non-digits
include on...
Regular Expressions- Match Anything
...tively "match any string".
Another option that only works for JavaScript (and is not recognized by any other regex flavor) is [^]* which also matches any string. But [\s\S]* seems to be more widely used, perhaps because it's more portable.
...
Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
.... Then we iterate through for i up to n, doing two things: pressing A once and pressing select all + copy followed by paste j times (actually j-i-1 below; note the trick here: the contents are still in the clipboard, so we can paste it multiple times without copying each time). We only have to consi...
“rm -rf” equivalent for Windows?
I need a way to recursively delete a folder and its children.
21 Answers
21
...
How do I check if a string is a number (float)?
...
Which, not only is ugly and slow
I'd dispute both.
A regex or other string parsing method would be uglier and slower.
I'm not sure that anything much could be faster than the above. It calls the function and returns. Try/Catch doesn't introd...