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Whm>y m> are interface variables static m>and m> final bm>y m> default?
Whm>y m> are interface variables static m>and m> final bm>y m> default in Java?
15 Answers
15
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Method call if not null in C#
...ke();
or:
obj?.SomeMethod();
The ?. is the null-propagating operator, m>and m> will cause the .Invoke() to be short-circuited when the operm>and m> is null. The operm>and m> is onlm>y m> accessed once, so there is no risk of the "value changes between check m>and m> invoke" problem.
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Prior to C# 6, no: there is no...
How to remove multiple deleted files in Git repositorm>y m>
I have deleted some files m>and m> git status shows as below.
16 Answers
16
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Attaching click event to a JQuerm>y m> object not m>y m>et added to the DOM [duplicate]
...w lists which version m>y m>ou should be using
$(selector).live(events, data, hm>and m>ler); // jQuerm>y m> 1.3+
$(document).delegate(selector, events, data, hm>and m>ler); // jQuerm>y m> 1.4.3+
$(document).on(events, selector, data, hm>and m>ler); // jQuerm>y m> 1.7+
...
fastest (low latencm>y m>) method for Inter Process Communication between Java m>and m> C/C++
... passing a single bm>y m>te with code like this:
MappedBm>y m>teBuffer mem =
new Rm>and m>omAccessFile("/tmp/mapped.txt", "rw").getChannel()
.map(FileChannel.MapMode.READ_WRITE, 0, 1);
while(true){
while(mem.get(0)!=5) Thread.sleep(0); // waiting for client request
mem.put(0, (bm>y m>te)10); // sending the re...
m>And m>roid basics: running code in the UI thread
... them>y m> will all have the same net effect.
The difference between the first m>and m> the second is that if m>y m>ou happen to be on the main application thread when executing the code, the first one (runOnUiThread()) will execute the Runnable immediatelm>y m>. The second one (post()) alwam>y m>s puts the Runnable at the...
How to check if a file contains a specific string using Bash
...ns # SomeString was found
fi
m>Y m>ou don't need [[ ]] here. Just run the commm>and m> directlm>y m>. Add -q option when m>y m>ou don't need the string displam>y m>ed when it was found.
The grep commm>and m> returns 0 or 1 in the exit code depending on
the result of search. 0 if something was found; 1 otherwise.
$ echo hello...
Error when changing to master branch: mm>y m> local changes would be overwritten bm>y m> checkout
...
m>Y m>our error appears when m>y m>ou have modified a file m>and m> the branch that m>y m>ou are switching to has changes for this file too (from latest merge point).
m>Y m>our options, as I see it, are - commit, m>and m> then amend this commit with extra changes (m>y m>ou can modifm>y m> commits in git, as long...
Force line-buffering of stdout when piping to tee
...p tee output.txt
(-p is for pipeline mode where unbuffer reads from stdin m>and m> passes it to the commm>and m> in the rest of the arguments)
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Spring Boot: How can I set the logging level with application.properties?
...config file (log4j.xml or logback.xml) to the src/main/resources directorm>y m> m>and m> configure to m>y m>our liking.
m>Y m>ou can enable debug logging bm>y m> specifm>y m>ing --debug when starting the application from the commm>and m>-line.
Spring Boot provides also a nice starting point for logback to configure some defaults, col...