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Using custom std::set comparator
...am trying to change the default order of the items in a set of integers to be lexicographic instead of numeric, and I can't get the following to compile with g++:
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What is the memory consumption of an object in Java?
Is the memory space consumed by one object with 100 attributes the same as that of 100 objects, with one attribute each?
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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
15
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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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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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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...
What does the caret (^) character mean?
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HEAD^ means the first parent of the tip of the current branch.
Remember that git commits can have more than one parent. HEAD^ is short for HEAD^1, and you can also address HEAD^2 and so on as appropriate.
You can get to parents of any commit, not just HEAD. You can also move ba...
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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