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Blog / Linux/Shell / Programming

How to Change Hadoop Output Delimiter

Hadoop’s default output delimiter (character separating the output key and value) is a tab ("\t"). This post explains how to change the default Hadoop output delimiter. Output Delimiter Configuration Property…

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January 25, 2021
Blog / Programming

How to Create a Disk Based List in Java

Occasionally when programming in Java you will need a List too large to hold in memory. MapDB is an open source Java library that allows you to create a disk…

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January 25, 2021
Blog / Programming

How to Create a Disk Based Map in Java

Occasionally when programming in Java you will need a Map too large to hold in memory. MapDB is an open source Java library that allows you to create a disk…

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January 25, 2021
Blog / Programming

Introduction to Java Streams

What are Java Streams? A Java stream is a sequence of elements of a specific type that are consumed from a source like Collections, arrays, or I/O resources. Streams are…

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January 25, 2021
Blog / Programming

What is the Java Supplier Interface?

The Java Supplier interface of the java.util.function package is a functional interface that is often used as an assignment target for lambda expressions. The get() method is the class’s only…

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January 25, 2021
Blog / Programming

What is the Java Function Interface?

The Java Function interface of the java.util.function package is a functional interface that is often used as an assignment target for lambda expressions. The apply(T t) method is the class’s…

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January 25, 2021
Blog / Programming

What is the Java Predicate Interface?

The Java Predicate interface of the java.util.function package is a functional interface that is often used as an assignment target for lambda expressions.  The test(T t) method is the class’s…

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January 25, 2021
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