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Generator Expressions vs. List Comprehension
...or slicing
print [5,6] + gen() # generators can't be added to lists
Basically, use a generator expression if all you're doing is iterating once. If you want to store and use the generated results, then you're probably better off with a list comprehension.
Since performance is the most common rea...
Standard concise way to copy a file in Java?
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As toolkit mentions above, Apache Commons IO is the way to go, specifically FileUtils.copyFile(); it handles all the heavy lifting for you.
And as a postscript, note that recent versions of FileUtils (such as the 2.0.1 release) have added the use of NIO for copying files; NIO can significantly ...
How to modify existing, unpushed commit messages?
... the most recent commit message
git commit --amend
will open your editor, allowing you to change the commit message of the most recent commit. Additionally, you can set the commit message directly in the command line with:
git commit --amend -m "New commit message"
…however, this can make multi-...
Convert String[] to comma separated string in java
...en a bunch of checks. I'm just explaining the concept, not giving the save-all example.
– Nico Huysamen
Jul 8 '11 at 10:27
3
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Merge Images Side by Side(Horizontally)
...hips with the montage utility. Montage will append each image side-by-side allowing you to adjust spacing between each image (-geometry), and the general layout (-tile).
montage [0-5].png -tile 5x1 -geometry +0+0 out.png
Other examples can be found on Montage Usage page
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Change Bootstrap tooltip color
...!!! Fixed. @codesnooker didn't see that you were mentioning the arrow!!! Really sorry!!!
– Praveen Kumar Purushothaman
Mar 10 '15 at 10:03
4
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Difference between database and schema
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A database is the main container, it contains the data and log files, and all the schemas within it. You always back up a database, it is a discrete unit on its own.
Schemas are like folders within a database, and are mainly used to group logical objects together, which leads to ease of setting pe...
Maintain the aspect ratio of a div with CSS
... an example where the .stretchy-wrap.onethird padding-bottom of 25% is actually 25% of the parent width. Can someone explain this?
– Misterparker
Feb 8 '13 at 15:53
4
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Android TextView with Clickable Links: how to capture clicks?
...v this happens with ListViews when a View's focusable is set true. This usually happens with Buttons/ImageButtons. Try calling setFocusable(false) on your TextView.
– Sufian
Sep 11 '14 at 10:59
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Swift - How to convert String to Double
...ocumentation:(They are not locale-aware) The following convenience methods all skip initial space characters (whitespaceSet) and ignore trailing characters. They are not locale-aware. NSScanner or NSNumberFormatter can be used for more powerful and locale-aware parsing of numbers.
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