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Concatenating null strings in Java [duplicate]
... s = null;
s = s + "hello";
System.out.println(s); // prints "nullhello"
and compiles it into bytecode as if you had instead written this:
String s = null;
s = new StringBuilder(String.valueOf(s)).append("hello").toString();
System.out.println(s); // prints "nullhello"
(You can do so yourself b...
use initial width for element not working in IE
I have a graph plugin that inserts canvas and a legend <table> to its container. In this plugin the table has no width defined and in my CSS there is a width for tables inside that container were my plugin gets inserted.
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How to tell if node.js is installed or not
I've recently installed node.js and I have no idea how to run applications. I installed node.js but couldn't find further instructions. What does one really need to do? I wanted to see if it was actually working. So I executed a script called hello.js. It went as such:
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add maven repository to build.gradle
I added a custom maven repository to build.gradle in Android Studio but the dependency is not being found
5 Answers
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Detecting arrow key presses in JavaScript
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@MrCroft - or also listen to onkeyup and stop the event there. Realistically you shouldn't be modifying UI behavior with Javascript, however.
– Mark Kahn
Jan 5 '17 at 19:52
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Group vs role (Any real difference?)
Can anyone tell me, what's the real difference between group and role? I've been trying to figure this out for some time now and the more information I read, the more I get the sense that this is brought up just to confuse people and there is no real difference. Both can do the other's job. I've alw...
How to sort a dataFrame in python pandas by two or more columns?
Suppose I have a dataframe with columns a , b and c , I want to sort the dataframe by column b in ascending order, and by column c in descending order, how do I do this?
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Has an event handler already been added?
Is there a way to tell if an event handler has been added to an object? I'm serializing a list of objects into/out of session state so we can use SQL based session state... When an object in the list has a property changed it needs to be flagged, which the event handler took care of properly before...
How do I force make/GCC to show me the commands?
...not seem to get GCC (or maybe it is make??) to show me the actual compiler and linker commands it is executing.
7 Answers...
How to check for changes on remote (origin) Git repository?
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"git fetch origin" and "git show-branch *master" were useful to me.
– Léa Massiot
May 16 '17 at 17:31
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