charlang/example/map.char

// declare an empty map
a := {}

// all keys will be converted to string type, values keep their original types
a["Num"] = 3
a[5] = "abc"
a[-1] = true
a["ary"] = [1, "xyz", false]
a[false] = "not true"
a.Item1 = "item 1"

pln(a)

// length is the number of key-value pairs in the map
pl("length of a: %v", len(a))

// index by dot
pl("a.Num: %v", a.Num)

// index by square brackets
a["Num"]++
pln(a["Num"])

// slice
pln(a[5][2:3])

a[5] = a[5] + a[5]

// slice to end
a[5] = a[5][1:]
pl("a[5]: %v", a[5])

// slice from begining
pln(a[5][:2])

// iterate
for k, v in a {
	println("[", k, "]:", v)
}
  
pln("---")

// declare map with initial values
b := {"intItem": 12, "floatItem": 5.6, "boolItem": true, "stringItem": "str1", "arrayItem": ["array", "in", "map"], "mapItem": {"map": 1, "in": "map"}}

plt(b)

pln("---")

c := {}

// all keys will be converted to string type
c[3] = "3"
c[18] = "abc"
c[-198] = "true"

pl("c: %v", c)

v1 := c[18]

if v1 == undefined {
	println("v1:", v1)
}

// index with non-existent key
v2 := c[19]

if v2 == undefined {
	println("v2:", v2)
}

// remove key-value pair
delete(c, 18)

println("c:", c)

// use methods
c.Set("new", true)

println("c:", c)

rs := c.set("another")

println("rs:", rs)

println(`c["new"]`, c.get("new"))

pl(`c["none"]: %v`, c.get("none"))

pln("size:", c.size())

pln("keys:", c.keys())

pln("values:", c.values())

pln("toOrdered:", c.toOrdered())

try {
	pln("unknown method:", c.unknown())
} catch e {
	pln("exception:", e)
} finally {
	pln("do finally")
}