07_collections directory created

07_collections/arrays.v

@@ -0,0 +1,86 @@
+pub fn main()
+{
+	mut nums := [1,2,3]
+
+	println(nums)
+	println(nums[0])
+	println(nums[1])
+
+	nums[1] = 5
+	println(nums)
+
+	// ===================================== //
+
+	nums << 4
+	println(nums)
+
+	mut names := ['John']
+	names << 'Peter'
+	names << 'Sam'
+	println(names)
+
+	names1 := ['John', 'Peter', 'Sam']
+	println('Alex' in names1)
+
+	// ===================================== //
+
+	mut nums1 := [1,2,3]
+	println('len ${nums1.len}')
+	println('cap ${nums1.cap}')
+
+	nums1 = []
+
+	println('len ${nums1.len}')
+	println('cap ${nums1.cap}')
+
+	// ===================================== //
+
+	mut a := []int{len: 10000, cap: 30000, init: 3}
+
+	println(a[0])
+
+	// ===================================== //
+
+	arr := []int{len: 5, init: -1} // [-1,-1,-1,-1,-1]
+	users := []int{} // Empty
+
+	assert arr.len == 5
+	assert users == []
+
+	mut numbers := []int{cap: 1000}
+
+	println(numbers.len)
+
+	for i in 0 .. 1000 {
+		numbers << i
+	}
+
+	// ===================================== //
+
+	count := []int{len: 4, init: index}
+	assert count == [0,1,2,3]
+	mut square := []int{len: 6, init: index * index}
+	assert square[2] == 4
+
+	mut object_list := []ObjectSumType{}
+	object_list << Point{1,1}
+	object_list << Line{
+			p1 : Point{3,3}
+			p2 : Point{4,4}
+	}
+
+	dump(object_list)
+
+}
+
+type ObjectSumType = Line | Point
+
+struct Point{
+	x int
+	y int
+}
+
+struct Line{
+	p1 Point
+	p2 Point
+}