Counting the Prime Arrangements
Return the number of permutations of 1 to n so that prime numbers are at prime indices (1-indexed.) (Recall that an integer is prime if and only if it …
The Minimum Absolute Difference Algorithm of an Array
Given an array of distinct integers arr, find all pairs of elements with the minimum absolute difference of any two elements. Return a list of pairs in ascending order(with …
Implement the Depth First Search Algorithm in Graph using Simple C/C++
Given a graph represented by G(V, E) where V is the vertices and E represents the edges, we can do a Depth First Search Algorithm (DFS) on any node/vertex. …
Beginner’s Introduction to PHP Memcached
Querying the Database e.g. MySQL could be very expensive relative to just a cache which is just a key value store . And for SELECT statements, we want to …
Using the Regular Expression to Replace External Links in WordPress for SEO purposes
Let’s say we want to put a REL=NOFOLLOW on all external links in your wordpress posts/pages, we can add a filter to parse the content using the regular expression …
5 Smart Guides In Taking The Best Hosting Provider
So you have designed your own website. What’s the next step? You need a domain and a host. Domains and domain names are relatively easy if you choose it …