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Perl if, else, elsif ("else if") syntax

Perl if, else, elsif ("else if") syntax By Alvin Alexander. Last updated: July 23 2016 Summary: This tutorial shows a collection of Perl if, else, and else if examples. Here are some examples of the...

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A Java “instanceof null” example

A Java “instanceof null” example By Alvin Alexander. Last updated: September 20 2019 You might think that when the Java instanceof operator is used to test a null reference, such as a null reference...

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A Java instanceof array example

A Java instanceof array example By Alvin Alexander. Last updated: September 30 2019 While working with various "Java instanceof" tests recently, my curiosity was piqued, and I thought I'd take a look...

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Scala, isInstanceOf, inheritance, getClass, and equals (equality)

Scala, isInstanceOf, inheritance, getClass, and equals (equality) By Alvin Alexander. Last updated: August 9 2017 I was doing a little Scala programming this morning, and because I hadn't written any...

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How to compare String equality in Java

How to compare String equality in Java By Alvin Alexander. Last updated: March 30 2017 Java String comparison FAQ: Can you share some examples of how to compare strings in Java? If you’re like me,...

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How to test String equality in Scala

How to test String equality in Scala By Alvin Alexander. Last updated: July 9 2017 This is an excerpt from the Scala Cookbook (partially modified for the internet). This is Recipe 1.1, “Testing String...

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Unix/Linux code to test whether “today” is a weekend day (or weekday)

Unix/Linux code to test whether “today” is a weekend day (or weekday) By Alvin Alexander. Last updated: January 27 2018 If you ever need an example of a Unix/Linux shell script where you need to...

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A collection of 100+ Scala String examples

A collection of 100+ Scala String examples By Alvin Alexander. Last updated: July 16 2019 This page contains a collection of over 100 Scala String examples, including strings functions, format...

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Yoda Conditions

Yoda Conditions By Alvin Alexander. Last updated: May 5 2019 Read more about Yoda Conditions I had never heard of the term “Yoda Conditions” until now, but I have seen them in some Java code where...

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How to define an `equals` method in a Scala class (object equality)

How to define an `equals` method in a Scala class (object equality) By Alvin Alexander. Last updated: June 10 2019 Table of Contents Solution A Scala `equals` method example Discussion Example 2: A...

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