How to duplicate zeros in place using Python
Given a fixed length array arr of integers, duplicate each occurrence of zero, shifting the remaining elements to the right.
Note that elements beyond …
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In-depth guides, insights, and best practices for modern software engineering
A Quick Introduction to Asyncio in Python3
Python has never been the best at doing multiple things at the same time.
While there are ways to mostly resolve this, such as using the …
Read Article →How to replace newlines with commas in CLI
If you need to replace all newline characters with a comma, or perhaps some other delimiter, then using the build-in tr utility will work very well …
How to make a disk cache using PHP
If you have a busy PHP driven website and don’t want to make constant queries to the database for each user that will see the same data, then …
Read Article →How to remove files without a certain extension?
You have a directory with a lot of files, and you want to delete only the files that don’t match a specific extension.
This is a simple task …
Read Article →How to debug an Apache 404 error
So you are getting an error 404 or perhaps even worse, a 500!
The error in your Apache2 logs looks something like this:
***.162.245.*** - - …
How to Reorder Data in Log Files using Python
Let’s say that you have an array or a list, or logs.
Each of these logs is a space-delimited string of words.
For example:
logs = ["dig1 8 …
Another WTF Javascript Moment
Javascript is a powerful language, but sometimes it doesn’t always do what you expect it to.
Take the following expression for example. …
Read Article →How to Bring Back GROUP BY in MySQL
If you are suddenly not able to perform GROUP BY statements as you used to after a MySQL/MariaDB version update, then you will have noticed the change …
How to implement a Queue using Stacks in Python
A common programming interview question, and for a change, one that you will actually be able to use in the job, is that of implementing a Queue by …
Read Article →Find positions of largest groups of characters in a String with Python
The question
Take a string S of lowercase letters.
These letters form consecutive groupings of like characters.
Find groups with 3 or more like …
Read Article →How to make Git “forget” about a file that was tracked but is now in .gitignore?
You can ignore certain files and folders from being committed to Git by means of including a .gitignore file.
Unfortunately, you may have forgotten to …
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