Create a function `sum` that implements currying. Currying is a transformation of functions that translates a function from being callable as f(x, y, ...
Height Balanced Binary Tree
Given a pointer to the root node of a binary tree, return true if the binary tree is height-balanced. A height-balanced binary tree is a Binary tree i...
Given a 2D matrix of numbers, return a spiral traversal of the matrix in the clockwise direction.
Select All Checkboxes
Given a `Select All` checkbox - toggle the children's checkboxes in such a way that when the `select all` button is clicked, all the boxes are checked...