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How do I remove repeated elements from ArrayList?
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In Java 8:
List<String> deduped = list.stream().distinct().collect(Collectors.toList());
Please note that the hashCode-equals contract for list members should be respected for the filtering to work properly.
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What good technology podcasts are out there?
...en this is obviously just my opinion. My opinion bounces between .NET and Java and just geek. And obvious omissions would reflect my opinion on "good". (Ahem, DNR.)
The rest of these are easily found by doing a podcast search in iTunes, or just googling (I'll do some repeating here to condense th...
Find a pair of elements from an array whose sum equals a given number
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Implementation in Java : Using codaddict's algorithm (Maybe slightly different)
import java.util.HashMap;
public class ArrayPairSum {
public static void main(String[] args) {
int []a = {2,45,7,3,5,1,8,9};
printSumPairs(a,1...
How to determine a Python variable's type?
...See the examples below, but there's no "unsigned" type in Python just like Java.
Positive integer:
>>> v = 10
>>> type(v)
<type 'int'>
Large positive integer:
>>> v = 100000000000000
>>> type(v)
<type 'long'>
Negative integer:
>>> v = ...
Regular Expressions: Is there an AND operator?
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Use a non-consuming regular expression.
The typical (i.e. Perl/Java) notation is:
(?=expr)
This means "match expr but after that continue matching at the original match-point."
You can do as many of these as you want, and this will be an "and." Example:
(?=match this expression)(?...
Difference between static class and singleton pattern?
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What's a static class? At least in Java, there's no such thing.
– Henrique Ordine
Aug 25 '12 at 9:00
17
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What's so great about Lisp? [closed]
...languages. For instance, once you really "get" closures, you'll understand Java's inner classes. And once you "get" first-class functions, you'll be depressed every time you use a language without them.
I've read The Little Schemer and am reading Practical Common Lisp, which are both excellent.
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ViewPager with previous and next page boundaries
... from here(ViewPager with previous and next page boundaries)
MainActivity.java
package com.deepshikha.viewpager;
import android.content.Context;
import android.content.res.Configuration;
import android.os.Build;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivit...
How to change root logging level programmatically for logback
...ail to understand why something as simple as Logging is so complicated in Java/Scala.
– Abhinandan Dubey
Jan 15 '19 at 16:04
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How to get a JavaScript object's class?
I created a JavaScript object, but how I can determine the class of that object?
18 Answers
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