How to Implement a Safe Data Get Function in Javascript?
In Javascript, given object var x = {a: {b: {c: “value”} } }, we can retrieve/access the field by x.a.b.c However, if a field doesn’t exist, exception will be …
How to Check If Two Arrays are Similar in PHP?
Given two variables in PHP, write a simple function to check if they are similar arrays. Two arrays are similar if they are of same sizes and contain the …
How to Break Integers (StairCases) using Dynamic Programming?
Given an integer N, find out the number of method to sum up to N by integers given the following requirements: Natural Numbers (Postive Integers) need to be strictly …
How to Check Binary Number with Alternating Bits?
Given an integer, check if its binary representation are containing the alternating bits. For example, 101, 10101, 1010 are binary numbers with alternative bits. But 1011, 1110 are not. …
How to Host your Own Website from Using your Own Computer?
You could host your own website from your own Windows computer without much effort and yet get a great amount of output. This is made possible through the use …
How to Determine the Type of Tree Nodes using SQL?
Given a Relational Table stroing the nodes in a tree-like data structure, like this: +----+------+ | id | p_id | +----+------+ | 1 | null | | 2 | …