Given an arbitrary ransom note string and another string containing letters from all the magazines, write a function that will return true if the ransom note can be construted from the magazines ; otherwise, it will return false.
Each letter in the magazine string contain only lowercase letters.
You may assume that both strings contain only lowercase letters.
canConstruct("a", "b") -> false canConstruct("aa", "ab") -> false canConstruct("aa", "ab") -> true
Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements.
For example, given nums = [0, 1, 0, 3, 12], after calling your function, nums should be [1, 3, 12, 0, 0].
You must do this in-place without making a copy of the array. Minimize the total number of operations.