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#ifdef #ifndef in Java
I doubt if there is a way to make compile-time conditions in Java like #ifdef #ifndef in C++.
8 Answers
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Android: How to enable/disable option menu item on button click?
...tionsMenu() method is called
only once, as described above. The
system keeps and re-uses the Menu you
define in this method until your
activity is destroyed. If you want to
change the Options Menu any time after
it's first created, you must override
the onPrepareOptionsMenu() method.
...
How to stop app that node.js express 'npm start'
..., poststop: Run by the npm stop command.
Set one of the above in your package.json, and then use npm stop
npm help npm-stop
You can make this really simple if you set in app.js,
process.title = myApp;
And, then in scripts.json,
"scripts": {
"start": "app.js"
, "stop": "pkill --sig...
How to calculate moving average without keeping the count and data-total?
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Martijn Courteaux
62k4242 gold badges185185 silver badges273273 bronze badges
answered May 26 '13 at 8:49
MuisMuis
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Concatenate two string literals
I am reading Accelerated C++ by Koenig. He writes that "the new idea is that we can use + to concatenate a string and a string literal - or, for that matter, two strings (but not two string literals).
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How to calculate percentage with a SQL statement
... a SQL Server table that contains users & their grades. For simplicity's sake, lets just say there are 2 columns - name & grade . So a typical row would be Name: "John Doe", Grade:"A".
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How do I use a Boolean in Python?
Does Python actually contain a Boolean value? I know that you can do:
7 Answers
7
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Print all but the first three columns
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A solution that does not add extra leading or trailing whitespace:
awk '{ for(i=4; i<NF; i++) printf "%s",$i OFS; if(NF) printf "%s",$NF; printf ORS}'
### Example ###
$ echo '1 2 3 4 5 6 7' |
awk '{for(i=4;i<NF;i++)printf"%s",$i OFS;if(NF)printf"%s",$NF;printf ORS}' |
tr ' ' '-'
4-5...
How to tell whether a point is to the right or left side of a line
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Regexident
28.9k1010 gold badges9090 silver badges9898 bronze badges
answered Oct 13 '09 at 14:12
Eric BainvilleEric...
How does cookie “Secure” flag work?
I know that a cookie with secure flag won't be sent via an unencrypted connection. I wonder how this works in-depth.
2 An...