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ExecutorService, how to wait for all tasks to finish
... wait for all tasks to complete, use the shutdown method instead of wait. Then follow it with awaitTermination.
Also, you can use Runtime.availableProcessors to get the number of hardware threads so you can initialize your threadpool properly.
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How bad is shadowing names defined in outer scopes?
...e a function with a few more arguments and quite a few more lines of code. Then you decide to rename your data argument as yadda but miss one of the places it is used in the function's body... Now data refers to the global, and you start having weird behaviour - where you would have a much more obvi...
What is the Linux equivalent to DOS pause?
...-r -p 'Press any key in the next five seconds...' key
if [ "$?" -eq "0" ]; then
echo 'A key was pressed.'
else
echo 'No key was pressed.'
fi
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What is “String args[]”? parameter in main method Java
...bjects.
In other words, if you run your program as java MyProgram one two then args will contain ["one", "two"].
If you wanted to output the contents of args, you can just loop through them like this...
public class ArgumentExample {
public static void main(String[] args) {
for(int i ...
Does Go have “if x in” construct similar to Python?
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@RonanDejhero then i could use WHERE :myValue IN (subquery) :)
– anilech
Mar 29 '19 at 11:37
3
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psql: FATAL: Ident authentication failed for user “postgres”
...\password
Enter password: ...
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Logout of psql by typing \q or ctrl+d. Then we connect as 'postgres'. The -h localhost part is important: it tells the psql client that we wish to connect using a TCP connection (which is configured to use password authentication), and not by a PEER connection (wh...
How to convert currentTimeMillis to a date in Java?
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You may use java.util.Date class and then use SimpleDateFormat to format the Date.
Date date=new Date(millis);
We can use java.time package (tutorial) - DateTime APIs introduced in the Java SE 8.
var instance = java.time.Instant.ofEpochMilli(millis);
var lo...
How to insert an element after another element in JavaScript without using a library?
...element.nextSibling does not have a next sibling, nextSibling is NULL, and then it will append at the end.
– Stefan Steiger
Oct 11 '19 at 14:50
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Eclipse hangs on loading workbench
...ns/. All Plugins actually did work after that. Some settings gone. You can then use Import... to import all your existing projects at once. Deleting workspace/.metadata is the last choice, but works. You can keep workspace/.metadata/.mylyn if you don't want to loose your tasks.
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Margin while printing html page
...r mm. To override this behaviour, the user must select 'Print preview' and then set the print size to 100% (default is Shrink To Fit).
A better option for full control on printed margins is to use the @page directive to set the paper margin, which will affect the margin on paper outside the html b...