Swapping of variables

There are a couple of classical ways to do it. Let the variables be:-

a = 5
b = 10

1. By using temporary variable "temp"(name as per your convenience).

temp = a
a = b
b = temp

2. Without "temp" or any extra variable

a = a + b   // 15
b = a - b   // b becomes 5
a = a - b   // a becomes 10

3. In Python like a Boss!! :D
a, b = b, a

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Solution Python QnA #1

Solution for Python QnA for November 14, 2018. # OUTPUT****************************************** >>> x = input () 12 >>> y = int ( input ( 'Please enter a number' )) Please enter a number45 >>> x + y Traceback (most recent call last): File "<stdin>" , line 1 , in < module > TypeError : must be str , not int >>> y + y 90 >>> x + x '1212' In this (x+y); addition of integer and string is not allowed. hence we get the TypeError.

Picking the structure!!

Use of arrays, rather sorted arrays or a linked list is somewhat difficult because both have their pros and cons. Arrays excel when we have to perform a binary search while it’s faster to add and remove elements from linked lists. A tree is one structure where there is ONLY ONE path to reach to a node. This can be explained further as “Nodes cannot be in closed loop” . Also there is a hierarchical relationship of parent and child. The average complexity varies from logarithmic to linear time. Now coming further to a data structure BSTs aka Binary Search Trees . Points to be remembered here:- Maximum two children. Left child is smaller than parent. Right one is greater than parent. Traversals :- In order Traversal Ascending Sort; left subtree + root+ right subtree. So the above tree will look like: 4, 12, 16, 25, 28, 32 Pre order Traversal Root + left subtree + right subtree recursively. Eg: 25, 12, 4, 16, 32, 28 Po...

meld 'n' weld

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