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How to check if current thread is not main thread
... 'Android' and this was my top result. To that end, for the non-Android SO Java users landing here, don't forget about:
public static void main(String[] args{
Thread.currentThread().setName("SomeNameIChoose");
/*...the rest of main...*/
}
After setting this, elsewhere in your code, you ca...
ArrayIndexOutOfBoundsException when using the ArrayList's iterator
...String s : arrayList)
if (s.equals(value))
// ...
As for
java.lang.ArrayIndexOutOfBoundsException: -1
You just tried to get element number -1 from an array. Counting starts at zero.
share
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What does the question mark operator mean in Ruby?
... even strongly typed languages have conventions like this. For example, in Java methods that return a boolean value are often prefixed with "is", as in isEmpty(), isDigit(), etc. In Ruby, the same methods would be written empty?, and digit? which is quite a bit nicer IMO.
– Aje...
Check if instance is of a type
...favorite. typeof(Class).IsAssignableFrom(object.getType()) similar to the Java instanceof operator.
– SkidRunner
Nov 7 '16 at 16:42
...
When to use “new” and when not to, in C++? [duplicate]
When should I use the "new" operator in C++? I'm coming from C#/Java background and instantiating objects is confusing for me.
...
Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
...me first serve. If you run sc.makeRDD(0 to 9, 2).mapPartitions(it => { java.lang.Thread.sleep(new java.util.Random().nextInt(1000)); it } ).map(_.toString).fold("")(_ + _) with 2+ cores several times, I think you will see it produces random (partition-wise) order. I've updated my answer accordin...
Gradle store on local file system
...ee where Gradle has cached artifacts with a simple script:
apply plugin: 'java'
repositories{
mavenCentral()
}
dependencies{
compile 'com.google.guava:guava:12.0'
}
task showMeCache << {
configurations.compile.each { println it }
}
Now if you run gradle showMeCache it should downlo...
Android dismiss keyboard
...nputMethodManager }
val windowHeightMethod = InputMethodManager::class.java.getMethod("getInputMethodWindowVisibleHeight")
val height = windowHeightMethod.invoke(imm) as Int
if (height > 0) {
imm.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0)
}
}
...
How to tell git to ignore individual lines, i.e. gitignore for specific lines of code [duplicate]
...
I had a similar issue writing java code. My solution was to markup code that I didn't want to commit and then add a pre-commit hook that would look for my markup:
#!/bin/bash
#
# This hook will look for code comments marked '//no-commit'
# - case-ins...
How do I redirect to the previous action in ASP.NET MVC?
...
In Mvc using plain html in View Page with java script onclick
<input type="button" value="GO BACK" class="btn btn-primary"
onclick="location.href='@Request.UrlReferrer'" />
This works great. hope helps someone.
@JuanPieterse has already answered using @Ht...