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What should every JavaScript programmer know? [closed]
Is there a set of things that every JavaScript programmer should know to be able to say "I know JavaScript"?
30 Answers
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Truncate a list to a given number of elements
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Use List.subList:
import java.util.*;
import static java.lang.Math.min;
public class T {
public static void main( String args[] ) {
List<String> items = Arrays.asList("1");
List<String> subItems = items.subList(0, min(items.siz...
Print “hello world” every X seconds
...duledExecutorService is even better, though; refer to Brian Goetz et al.'s Java Concurrency in Practice. The latter class has been around for nearly a decade—it's sad that all these other answers overlook it.
– Michael Scheper
Aug 14 '13 at 2:32
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Why is Double.MIN_VALUE in not negative
...his. I was porting some statistical analysis code and blindly translating java to C#. I noticed some numbers coming out at -infinity or NaN and took a closer look at the algorithm. I realized that double.MIN_VALUE made no sense in context and did a search. This post comes up before the java docs...
Benefit of using Parcelable instead of serializing object
...t have triggered the question, why is Android not using the
built-in Java serialization mechanism? It turns out that the
Android team came to the conclusion
that the serialization in Java is far too slow to satisfy Android’s
interprocess-communication
requirements. So the tea...
Match multiline text using regular expression
I am trying to match a multi line text using java. When I use the Pattern class with the Pattern.MULTILINE modifier, I am able to match, but I am not able to do so with (?m).
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How to check programmatically if an application is installed or not in Android?
... No doubt your post is really helpful , but i am getting a exception "java.lang.RuntimeException: Adding window failed" and " E/AndroidRuntime(7554): Caused by: android.os.TransactionTooLargeException 05-14 11:37:25.305: E/AndroidRuntime(7554): at android.os.BinderProxy.transact(Native Metho...
How to delete a whole folder and content?
...the link is deleted and not the target of the link." from docs.oracle.com/javase/tutorial/essential/io/delete.html
– corbin
Apr 6 '15 at 17:58
3
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Find a class somewhere inside dozens of JAR files?
... you can easily find the classes.
Another tool, that comes to my mind, is Java Decompiler. It can open a lot of jars at once and helps to find classes as well.
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Verify object attribute value with mockito
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If you're using Java 8, you can use Lambda expressions to match.
import java.util.Optional;
import java.util.function.Predicate;
import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
public class LambdaMatcher<T> extends...