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Java: How to set Precision for double value? [duplicate]
... to N digits).
Rounds down the number (not round to nearest).
See sample test cases here.
123.12345678 ==> 123.123
1.230000 ==> 1.23
1.1 ==> 1.1
1 ==> 1.0
0.000 ==> 0.0
0.00 ==> 0.0
0.4 ==> 0.4
0 ==> 0.0
1.4999 ==> 1.499
1.4995 ==> 1.499
1.4994 ==> 1.499
Here's ...
Why is the Java main method static?
...guage Specification
Check out Chapter 12 Execution - Section 12.1.4 Invoke Test.main:
Finally, after completion of the initialization for class Test (during which other consequential loading, linking, and initializing may have occurred), the method main of Test is invoked.
The method main must be d...
Returning value from called function in a shell script
...ere's how to do each of those options:
1. Echo strings
lockdir="somedir"
testlock(){
retval=""
if mkdir "$lockdir"
then # Directory did not exist, but it was created successfully
echo >&2 "successfully acquired lock: $lockdir"
retval="true"
else
ec...
Best cross-browser method to capture CTRL+S with JQuery?
... This is the only answer that worked for me in all the browsers I tested, including Chrome Version 28.0.1500.71
– T. Brian Jones
Jul 22 '13 at 16:49
28
...
Changing all files' extensions in a folder with one command on Windows
... in batch files, this code is working:
FOR /R "C:\Users\jonathan\Desktop\test" %%f IN (*.jpg) DO REN "%%f" *.png
In this example all files with .jpg extensions in the C:\Users\jonathan\Desktop\test directory are changed to *.png.
...
How can I maintain fragment state when added to the back stack?
...ash. Version 2 removes _rootView in onDestroyView(), as dell116 suggested. Tested on Android 4.0.3, 4.4.4, 5.1.0.
Version 2
public class FragmentA extends Fragment {
View _rootView;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState...
Remove blank lines with grep
...
I prefer using egrep, though in my test with a genuine file with blank line your approach worked fine (though without quotation marks in my test). This worked too:
egrep -v "^(\r?\n)?$" filename.txt
...
How to have click event ONLY fire on parent DIV, not children?
... Thanks, I did the same way, but I'm struggling to write unit test case around it. How can I make sure click programatic click event trigger should be blocked?
– Pankaj Parkar
Dec 16 '18 at 6:44
...
How to check if a Ruby object is a Boolean
...ess and everything is true except instances of FalseClass and nil
Boolean tests return an instance of the FalseClass or TrueClass
(1 > 0).class #TrueClass
The following monkeypatch to Object will tell you whether something is an instance of TrueClass or FalseClass
class Object
def boolean?...
How do I prompt for Yes/No/Cancel input in a Linux shell script?
...cho Yes
else
echo No
fi
(Thanks to Adam Katz's comment: Replaced the test above with one that is more portable and avoids one fork:)
POSIX, but single key feature
But if you don't want the user to have to hit Return, you could write:
(Edited: As @JonathanLeffler rightly suggest, saving stty...