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Why is processing a sorted array faster than processing an unsorted array?
Here is a piece of C++ code that shows some very peculiar behavior. For some strange reason, sorting the data miraculously makes the code almost six times faster:
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What's the best way to break from nested loops in JavaScript?
What's the best way to break from nested loops in Javascript?
15 Answers
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Read file data without saving it in Flask
...am writing my first flask application. I am dealing with file uploads, and basically what I want is to read the data/content of the uploaded file without saving it and then print it on the resulting page. Yes, I am assuming that the user uploads a text file always.
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Visual Studio or Resharper functionality for placement of using directives
I like to put my using directives inside the current namespace, and not outside as VS and Resharper per default puts them.
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CSV file written with Python has blank lines between each row
... code reads thefile.csv , makes changes, and writes results to thefile_subset1 .
9 Answers
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Simplest two-way encryption using PHP
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Edited:
You should really be using openssl_encrypt() & openssl_decrypt()
As Scott says, Mcrypt is not a good idea as it has not been updated since 2007.
There is even an RFC to remove Mcrypt from PHP - https://wiki.php.net/rfc/mcrypt-viking-fune...
Counting occurrences in Vim without marking the buffer changed
...d the substitution, leave the second pattern empty, and add the “n” flag:
:%s/pattern-here//gn
This is described as an official tip.
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Detect & Record Audio in Python
I need to capture audio clips as WAV files that I can then pass to another bit of python for processing. The problem is that I need to determine when there is audio present and then record it, stop when it goes silent and then pass that file to the processing module.
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SQL Server: Examples of PIVOTing String data
... Most of the examples that I have found involve counting or summing up numbers. I just want to pivot some string data. For example, I have a query returning the following.
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What are markers in Java Logging frameworks and what is a reason to use them?
...is is a rehashed version my answer to the question "Best practices for using Markers in SLF4J/Logback".
Markers can be used to color or mark a single log statement. What you do with these colors, i.e. markers, is entirely up to you. However, two patterns seem to be common for marker usage.
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