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What is this weird colon-member (“ : ”) syntax in the constructor?
... will be called once and the object will be constructed and initialized in one operation.
If you use assignment then the fields will be first initialized with default constructors and then reassigned (via assignment operator) with actual values.
As you see there is an additional overhead of creati...
java: (String[])List.toArray() gives ClassCastException
...s "ctrl + k", or add " ` " before the first letter of code and at the last one another one. You can also select "{}" in the help at the top when writing the answer!
– M.K
Feb 9 '19 at 9:51
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Specifying Maven's local repository location as a CLI parameter
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One kind of hacky way that would work is:
Add <localRepository>${m2.localRepository}</localRepository> to your settings.xml
In your mvn.sh or mvn.bat, add -Dm2.localRepository=<full path to home dir>/.m2/r...
What is meant by Ems? (Android TextView)
...ont with 12sp gives 1em that is different in pixels width than the English one.
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Confused by python file mode “w+”
...y hundreds of people. Don't just click the "Add Comment" button where only one or two people will see it.
– rmunn
Jul 2 '18 at 1:05
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How to implement WiX installer upgrade?
...earning WiX is like trying to figure out the obscure incantations that someone decided 'made sense' to perform a simple action. Kind of like UNIX.
– mmr
Mar 25 '09 at 0:44
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Encrypt Password in Configuration Files? [closed]
...Exception {
return Base64.getDecoder().decode(property);
}
}
One problem remains: Where should you store the password that you use to encrypt the passwords? You can store it in the source file and obfuscate it, but it's not too hard to find it again. Alternatively, you can give it as a...
What's a concise way to check that environment variables are set in a Unix shell script?
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Parameter Expansion
The obvious answer is to use one of the special forms of parameter expansion:
: ${STATE?"Need to set STATE"}
: ${DEST:?"Need to set DEST non-empty"}
Or, better (see section on 'Position of double quotes' below):
: "${STATE?Need to set STATE}"
: "${DEST:...
Multiple Updates in MySQL
...le rows at once, is there a way to update multiple rows at once (as in, in one query) in MySQL?
17 Answers
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UIButton remove all target-actions
...action-forControlEvents: to a UIButton. I'd like to remove all of these in one go without deallocating anything. I will then set new targets.
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