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How to read a file line-by-line into a list?
... read from the file and processed, as suggested by @DevShark here. Holding all lines in a collection object is not a good idea if memory is a constraint or the file is large. The execution time is similar in both the approaches.
– Tirtha R
Mar 2 '18 at ...
Google Guava isNullOrEmpty for collections
...eyard."
We don't believe that "is null or empty" is a question you ever really want to be asking about a collection.
If a collection might be null, and null should be treated the same as empty, then get all that ambiguity out of the way up front, like this:
Set<Foo> foos = NaughtyClass.getF...
How to check command line parameter in “.bat” file?
...gq bla2"
The syntax of the command is incorrect.
The script won't run at all. Same for args.bat:
D:\>args bla2"
The syntax of the command is incorrect.
But what do I get, when the number of "-characters "matches" (i.e. - is even), in such a case:
D:\>args bla2" "bla3
bla2" "bla3
Done.
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How can I replace text with CSS?
...
display: none; doesn’t work because ::after really means “inside this element, but at the end”, in case anyone was curious.
– Ry-♦
Jun 30 '14 at 22:17
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how to programmatically fake a touch event to a UIButton?
...igh up the UI chain as possible. So, what I'd like to do is programmatically trigger a button-press, as if the user had pressed the button in the GUI .
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JUnit test with dynamic number of tests
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Take a look at Parameterized Tests in JUnit 4.
Actually I did this a few days ago. I'll try to explain ...
First build your test class normally, as you where just testing with one input file.
Decorate your class with:
@RunWith(Parameterized.class)
Build one constructor th...
How to determine if a record is just created or updated in after_save
...
I was looking to use this for an after_save callback.
A simpler solution is to use id_changed? (since it won't change on update) or even created_at_changed? if timestamp columns are present.
Update: As @mitsy points out, if this check is needed outside of callbacks th...
How can I use Homebrew to install both Python 2 and 3 on Mac?
...on't want to mess with path and get into trouble.
Right now I have 2.7 installed through Homebrew.
9 Answers
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Bootstrap: how do I change the width of the container?
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Theoretically, there are infinite combinations that match 1000px. An example: 12*65 + 11*20 = 1000 (there are only 11 gutters between columns).
– albertedevigo
Jun 14 '13 at 14:09
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How do you use an identity file with rsync?
...load the key into memory. ssh will try identities from ssh-agent automatically if it can find them. Commands would be
eval $(ssh-agent) # Create agent and environment variables
ssh-add ~/.ssh/1234-identity
ssh-agent is a user daemon which holds unencrypted ssh keys in memory. ssh finds it based...