update archives folder playground b00tc4mp#70

staff/josep-garcia-contreras/playground/array/Array.prototype.pop.js

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+console.log('TEST Array.prototype.pop')
+
+console.log('CASE extract tomato from plants')
+
+var plants = ['broccoli', 'cauliflower', 'cabbage', 'kale', 'tomato']
+
+var plant = plants.pop()
+
+console.log(plants) 
+// Resultado esperado plants ['broccoli', 'cauliflower', 'cabbage', 'kale']
+console.log(plant)
+// Resultado esperado 'tomato'

staff/josep-garcia-contreras/playground/array/Array.prototype.push.js

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+console.log('TEST Array.prototype.push')
+
+console.log('CASE add 400 to nums')
+
+var nums = [100, 200, 300]
+console.log(nums)
+var length = nums.push(400)
+console.log(nums)
+
+console.log(length)
+
+
+var chars = ['A', 'B', 'C', 'D', 'E']
+var length = chars.push('F')
+console.log(chars)
+// ['A', 'B', 'C', 'D', 'E', 'F'] (6)
+console.log(length)
+// 6
+
+var colors = ['red', 'green', 'blue', 'magenta']
+var length = colors.push('cyan', 'yellow', 'orange', 'pink')
+console.log(colors)
+//['red', 'green', 'blue', 'magenta', cyan', 'yellow', 'orange', 'pink']
+console.log(length)
+//8

staff/josep-garcia-contreras/playground/arroz/Arroz.prototype.pop.js

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+var Arroz = function () { this.length = 0 }
+
+Arroz.prototype.pop = function () {
+    /*
+    extract last element from arroz (reference in a local variable)
+    delete last element from arroz
+    decrement arroz length by 1
+    return extracted element
+    */
+
+    var last = this[this.length - 1]
+    delete this[this.length - 1]
+    this.length-- // this.length = this.length - 1
+    return last
+}
+
+console.log('CASE extract tomato from plants')
+
+var plants = new Arroz
+plants[0] = 'broccoli'
+plants[1] = 'cauliflower'
+plants[2] = 'cabbage'
+plants[3] = 'kale'
+plants[4] = 'tomato'
+plants.length = 5
+var plant = plants.pop()
+console.log(plants)
+// Arroz { 0: 'broccoli', 1: 'cauliflower', 2: 'cabbage', 3: 'kale', length: 4 }
+console.log(plant)
+// tomato
+
+console.log('CASE extract last item from cart')
+
+var socks = { brand: 'Adidas', size: 'L', price: 10 }
+var tshirt = { brand: 'Nike', size: 'L', price: 20 }
+var shoes = { brand: 'Puma', size: 44, price: 50 }
+var cart = new Arroz
+cart[0] = socks
+cart[1] = tshirt
+cart[2] = shoes
+cart.length = 3
+var extracted = cart.pop()
+console.log(cart)
+/* 
+Arroz {
+    0: { brand: 'Adidas', size: 'L', price: 10 },
+    1: { brand: 'Nike', size: 'L', price: 20 },
+    length: 2
+}
+*/
+console.log(extracted)
+// { brand: 'Puma', size: 44, price: 50 }

staff/josep-garcia-contreras/playground/arroz/Arroz.prototype.push.js

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+var Arroz = function () { this.length = 0 }
+
+Arroz.prototype.push = function (element) {
+    this[this.length] = element
+    this.length++ //this.length = this.length + 1
+    return this.length
+}
+
+console.log('TEST Arroz.prototype.push')
+
+console.log('CASE add 400 to nums')
+
+var nums = new Arroz
+nums[0] = 100
+nums[1] = 200
+nums[2] = 300
+nums.length = 3
+
+var length = nums.push(400)
+console.log(nums)
+// Arroz { 0: 100, 1: 200, 2: 300, 3: 400, length: 4 }
+console.log(length)
+// 4
+
+console.log('CASE add F to chars')
+
+var chars = new Arroz
+chars[0] = 'A'
+chars[1] = 'B'
+chars[2] = 'C'
+chars[3] = 'D'
+chars[4] = 'E'
+chars.length = 5
+
+var length = chars.push('F')
+console.log(chars)
+// Arroz { 0: 'A', 1: 'B', 2: 'C', 3: 'D', 4: 'E', 5: 'F', length: 6 }
+console.log(length)
+// 6