mathonsunday

func reverseWords(_ message: inout String) {
    if message.isEmpty {
        return
    }
    var leftPosition = message.startIndex
    var rightPosition = message.index(before: message.endIndex)
    var startingLeftPosition = leftPosition
    
    while leftPosition < rightPosition {
        if message[leftPosition] == " " {

mathonsunday

func reverse(_ str: inout String) {
    if str.isEmpty {
        return
    }
    var leftPointer = str.startIndex
    var rightPointer = str.index(before: str.endIndex)
    while leftPointer < rightPointer {
        let leftChar = str[leftPointer]
        str.replaceSubrange(leftPointer..<str.index(after: leftPointer), with: String(str[rightPointer]))

mathonsunday

//
//  ContentView.swift
//  SwiftUIDoubleSlider
//
//  Created by Veronica Ray on 6/23/19.
//  Copyright © 2019 Veronica Ray. All rights reserved.
//

import SwiftUI

mathonsunday

//
//  ContentView.swift
//  SwiftUIDoubleSlider
//
//  Created by Veronica Ray on 6/23/19.
//  Copyright © 2019 Veronica Ray. All rights reserved.
//

import SwiftUI

mathonsunday

import Foundation
import PlaygroundSupport

var userDefaults = UserDefaults(suiteName: #file)
userDefaults!.removePersistentDomain(forName: #file)
let storageNameSpacePrefix = "favorite_events_"

func isFavorited(artistId: String) -> Bool {
    return userDefaults!.dictionaryRepresentation().keys.contains(artistIdKey(artistId: artistId))
}

mathonsunday

import Foundation
import PlaygroundSupport

let startChar = Unicode.Scalar("a").value
let endChar = Unicode.Scalar("z").value
for currentChar in startChar...endChar {
    if let scalar = Unicode.Scalar(currentChar) {
        let char = Character(scalar)
        print(char)
    }

mathonsunday

import Foundation
import PlaygroundSupport

func wordsWith(prefix: String, in dictionary: [String]) -> [String] {
    var output: [String] = []
    let prefixCount = prefix.count
    let prefixCharArray = Array(prefix)
    wordLoop: for word in dictionary {
        let charArray = Array(word)

mathonsunday

var count = 0
func findSingleValueTrees(root: TreeNode?) -> Int {
    // if root is nil return 0
    guard let root = root else {
        return 0
    }
    findSingleValueTreesHelper(root)
    return count
}

mathonsunday

/*
 * Complete the mergeArrays function below.
 */
func mergeArrays(arr: [[Int]]) -> [Int] {
     guard arr.count > 1 else {
         return arr[0]
     }
     let mid = arr.count / 2
     var leftMultidimensionalArray = [[Int]]()

mathonsunday

    @discardableResult
    public mutating func pop() -> Value? {
        defer    {
            head = head?.next
            if isEmpty {
                tail = nil
            }
        }
        return head?.value
    }