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Using Regular Expressions to Extract a Value in Java
...round brackets (Testing)
System.out.println(m.group(2)); // second one (123)
System.out.println(m.group(3)); // third one (Testing)
}
}
Since you're looking for the first number, you can use such regexp:
^\D+(\d+).*
and m.group(1) will return you the first number. Note that ...
What's the best way to share data between activities?
I have one activity which is the main activity used throughout the app and it has a number of variables. I have two other activities which I would like to be able to use the data from the first activity.
Now I know I can do something like this:
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How do negative margins in CSS work and why is (margin-top:-5 != margin-bottom:5)?
... spec as described in calculating heights and margins for absolutely positioned non-replaced elements.
If I were to make a graphical representation, I'd probably go with something like this (not to scale):
The margin box lost 8px on the top, however this does not affect the content & padding...
SLF4J: Class path contains multiple SLF4J bindings
...ency:tree in this project pom.xml parent folder, giving:
Now choose the one you want to ignore (could consume a delicate endeavor I need more help on this)
I decided not to use the one imported from spring-boot-starter-data-jpa (the top dependency) through spring-boot-starter and through spring-...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...multiplied my sum of squared by rsqrt of it, which is exactly what you've done in your tests), and it performed better.
2. Computing rsqrt using simple lookup table might be easier, as for rsqrt, when x goes to infinity, 1/sqrt(x) goes to 0, so for small x's the function values doesn't change (a l...
Why does python use 'else' after for and while loops?
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It's a strange construct even to seasoned Python coders. When used in conjunction with for-loops it basically means "find some item in the iterable, else if none was found do ...". As in:
found_obj = None
for obj in objects:
if obj.key == search_key:
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.toArray(new MyClass[0]) or .toArray(new MyClass[myList.size()])?
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Very interesting comment. I'm surprised no one has commented on this. I guess it's because it contradicts the other answers here, as far as speed. Also interesting to note, this guys reputation is almost higher than all the other answers (ers) combined.
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Argparse: Required arguments listed under “optional arguments”?
I use the following simple code to parse some arguments; note that one of them is required. Unfortunately, when the user runs the script without providing the argument, the displayed usage/help text does not indicate that there is a non-optional argument, which I find very confusing. How can I get p...
Is it Pythonic to use list comprehensions for just side effects?
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It is very anti-Pythonic to do so, and any seasoned Pythonista will give you hell over it. The intermediate list is thrown away after it is created, and it could potentially be very, very large, and therefore expensive to create.
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jQuery.ajax handling continue responses: “success:” vs “.done”?
...ys to 'continue' the script once the call has been made: success: and .done .
3 Answers
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