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python max function using 'key' and lambda expression
... expression to return the instance of type Player having maximum totalScore among the list players .
6 Answers
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How to tell if a string is not defined in a Bash shell script
If I want to check for the null string I would do
12 Answers
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Pros and Cons of Interface constants [closed]
...ou can avoid the use of constants by implementing other patterns (strategy or perhaps flyweight), there is something to be said for not needing a half dozen other classes to represent a concept. I think what it boils down to, is how likely is there a need for other constants. In other words, is th...
Java regular expression OR operator
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You can just use the pipe on its own:
"string1|string2"
for example:
String s = "string1, string2, string3";
System.out.println(s.replaceAll("string1|string2", "blah"));
Output:
blah, blah, string3
The main reason to use parentheses is to limit the scope of the alternatives:
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check android application is in foreground or not? [duplicate]
I went through a lot of answers for this question.But it's all about single activity..How to check whether the whole app is running in foreground or not ?
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Evaluating a mathematical expression in a string
This returns the following error:
11 Answers
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vector vs. list in STL
...ut the end of a sequence repeatedly.
Check out the complexity guarantees for each different type of container:
What are the complexity guarantees of the standard containers?
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Python subprocess.Popen “OSError: [Errno 12] Cannot allocate memory”
Note: This question was originally asked here but the bounty time expired even though an acceptable answer was not actually found. I am re-asking this question including all details provided in the original question.
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Matching a space in regex
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If you're looking for a space, that would be " " (one space).
If you're looking for one or more, it's " *" (that's two spaces and an asterisk) or " +" (one space and a plus).
If you're looking for common spacing, use "[ X]" or "[ X][ X]*" or...
How to switch a user per task or set of tasks?
...te a command with sudo privileges ( sudo: yes ) because I'd like to do it for a certain user. Ideally I'd much rather use sudo to switch to that user and execute the commands normally. Because then I won't have to do my usual post commands clean up such as chowning directories. Here's a snippet from...