The Contains Trap in Java Collections http://ift.tt/2cMD9qL...

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The Contains Trap in Java Collections
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One of the nasty little traps a Java developer can run into occurs when Collection.contains(Object) is not used with appropriate understanding. I demonstrate this potential trap in this post.



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Difference between git reset soft, mixed and hard http://ift.tt/2cxNzYO...

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Difference between git reset soft, mixed and hard
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The reset command. Confusing. Misunderstood. Misused. But it doesn’t need to be that way! It’s really not too confusing once you figure out what’s going on. Definitions First, let’s define a few terms. HEAD This is...



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How to Bulk Rename Files in Linux - use rename command http://ift.tt/2c6VLCK...

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How to Bulk Rename Files in Linux - use rename command
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How to bulk rename files in Linux with the rename command, including an intro to Perl substitution and regular expressions.



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Tips for Writing Better Spark Programs http://ift.tt/2cuGYgu...

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Tips for Writing Better Spark Programs
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Writing efficient Spark programs requires a deeper understanding of Spark internals. In this talk, we present practical tips for writing better Spark programs for the beginner or intermediate Spar...



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Logback – Duplicate log messages http://ift.tt/2bYXx6a http...

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Logback – Duplicate log messages
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package com.mkyong.test; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class App { private static final Logger log = LoggerFactory.getLogger(App.class); public static void main(String[] args) { log.debug("Testing"); } }. P.S Tested with Logback 1.1.2 ...



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iptables - port forwarding how-to http://ift.tt/2czNPIT...

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iptables - port forwarding how-to
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Besides using NAT for accessing the internet with multiple machines using a single IP address, there are many other uses of NAT. One of them is to forward all traffic that is sent to a certain TCP port to another host. In practice, this technique can be used to test a service on a new host ...



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Databricks Spark Knowledge Base http://ift.tt/2bLyVPU...

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Databricks Spark Knowledge Base
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Databricks Spark Reference Applications
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The contents contained here is also published in Gitbook format.



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