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Collect successive pairs from a stream
...eamEx library which extends standard streams provides a pairMap method for all stream types. For primitive streams it does not change the stream type, but can be used to make some calculations. Most common usage is to calculate differences:
int[] pairwiseDiffs = IntStreamEx.of(input).pairMap((a, b)...
What's the difference between the data structure Tree and Graph?
Academically speaking, what's the essential difference between the data structure Tree and Graph? And how about the tree based search and Graph based search?
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How can I deploy an iPhone application from Xcode to a real iPhone device?
... do this a lot, be sure to check the other answers - you can make XCode do all the job to you but it's a troublesome procedure to trick it on doing that.
– cregox
Apr 16 '11 at 16:06
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How Many Seconds Between Two Dates?
So I have two dates YYYY-MM-DD and ZZZZ-NN-EE
9 Answers
9
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Function in JavaScript that can be called only once
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If by "won't be executed" you mean "will do nothing when called more than once", you can create a closure:
var something = (function() {
var executed = false;
return function() {
if (!executed) {
executed = true;
// do something
}
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Java Keytool error after importing certificate , “keytool error: java.io.FileNotFoundException & Acc
...mmand prompt in administrator mode. If not, you can also go to start -> all programs -> accessories -> right click command prompt and click 'run as administrator'.
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How to check whether a file or directory exists?
...(err) { return false, nil }
return false, err
}
Edited to add error handling.
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InputStream from a URL
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Calling this method in UI thread in Android will raise an exception. Do it in a background thread. Use Bolts-Android
– Behrouz.M
Mar 6 '19 at 10:16
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Error: Could not create the Java Virtual Machine Mac OSX Mavericks
I just installed the latest Java SDK 7-67 from Oracle on the Mac 10.9.4. I then ran the command java -v in Terminal and I get this message:
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class method generates “TypeError: … got multiple values for keyword argument …”
...e type of error if your function def includes self as the first parameter, and then you accidentally call the function also with self as the first parameter.
– Christopher Hunter
Aug 12 '19 at 20:10
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