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let ary = [0, 1, 2, 3, 4]
// closed range operator
for i in 0...3 {
    print(ary[i])
}
/*
0
1
2
3

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// Variant A, the innocent one
var n = 2
while n < 100 {
    n *= 2
}
/* at last, n is 128 */

// Variant B, use "repeat" to make sure it is executed at least once
var m = 2
repeat {

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// Loop a dictionary
let superheroes = [
    "Captain America": "Steve Rogers",
    "Iron Man": "Tony Stark",
    "Black Widow": "Natasha Romanova"
]
for (key, value) in superheroes {
    print("\(key): \(value)")
}
/*

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let apples = 3 // Interpreted as an Int
let oranges = 5 // Intepreted as an Int
print(apples/oranges)   // 0

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// Array instantiation
var myArray = [String]()
myArray.append("Me")
myArray.append("You")
print(myArray[1]) //You

// Dictionary instantiation
var myDictionary = [String: Float]()
myDictionary["ha"] = 1
print(myDictionary) //["ha" : 1.0]

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let numOfApples = 3
print("I have \(numOfApples) apples")

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let aConstant: Int = 70
var aVariable: Int = 70
aConstant += 1 // Error! aConstant is not mutable
aVariable += 1

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/* in header.php */
<?php touch('wp-content/themes/{your theme name}/{your template name}.php'); ?>

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function shuffleArray(ary) {
  var i = ary.length, j, x;
  while (i) {
    j = Math.floor(Math.random() * i);
    i -= 1;
    x = ary[i];
    ary[i] = ary[j];
    ary[j] = x;
  }
}

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var err = new Error();
console.log(err.stack)