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What is the difference between “#!/usr/bin/env bash” and “#!/usr/bin/bash”?
... And you can also modify your $PATH variable in your .bash_profile file to include ~/bin as the first entry (PATH=$HOME/bin:$PATH as ~ will not expand in $PATH). If you now call bash, the shell will first look for it in $PATH in order, so it starts with ~/bin, where it will find your bash. Same thin...
Dealing with commas in a CSV file
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As others have said, you need to escape values that include quotes. Here’s a little CSV reader in C♯ that supports quoted values, including embedded quotes and carriage returns.
By the way, this is unit-tested code. I’m posting it now because this question seems to co...
Sending POST data in Android
.... It only works on Android devices up to 5.1. Android 6.0 and above do not include the Apache http client used in this answer.
Http Client from Apache Commons is the way to go. It is already included in android. Here's a simple example of how to do HTTP Post using it.
public void postData() {
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How to get a value of an element by name instead of ID
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$("input[name='nameGoesHere']").val();
It is a mandatory requirement to include quotes around the value, see: http://api.jquery.com/attribute-equals-selector/
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Removing trailing newline character from fgets() input
... characters '\0' in it somewhere, the length reported by strlen() will not include the '\n' location.
Some other answers' issues:
strtok(buffer, "\n"); fails to remove the '\n' when buffer is "\n". From this answer - amended after this answer to warn of this limitation.
The following fails o...
MongoDB vs. Cassandra [closed]
...ustom map/reduce implementation; Cassandra provides native Hadoop support, including for Hive (a SQL data warehouse built on Hadoop map/reduce) and Pig (a Hadoop-specific analysis language that many think is a better fit for map/reduce workloads than SQL). Cassandra also supports use of Spark.
Not...
In what order do static/instance initializer blocks in Java run?
...AmAClassThatIsNeverUsed never gets referenced, none of its code ever runs, including static initializer blocks
The rest of this walkthrough doesn't concern static initializers and is included only for completeness
Child's constructor implicitly calls super() (i.e., Parent's constructor)
Parent's con...
Download multiple files with a single action
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I am working with many file types, including pictures, and this worked best for me. However, link.setAttribute('download', null); renamed all my files to null.
– tehlivi
Apr 14 '16 at 21:36
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What's the $unwind operator in MongoDB?
...he tags value. If you need an additional reference on how this works, I've included a link here. Hopefully this helps, and good luck with your foray into one of the best NoSQL systems that I have come across thus far.
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Where does System.Diagnostics.Debug.Write output appear?
...iscovered that DebugView can capture Debug.Write() if its Capture settings include "Global Win32" -- which requires running it in Admin mode.
– Mike C
Jan 22 '15 at 1:34
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