Logo

Programming-Idioms

This language bar is your friend. Select your favorite languages!
Select your favorite languages :
  • Or search :

Idiom #281 Use a Point as a map key

You have a Point with integer coordinates x and y. Create a map m with key type Point (or equivalent) and value type string. Insert "Hello" at position (42, 5).

Point = Struct.new(:x, :y)
m = {Point.new(42, 5) => "Hello"}
import "dart:math";
Map<Point, String> m = {};
m[Point(42, 5)] = "Hello";

m := map[Point]string{}
p := Point{x: 42, y: 5}
m[p] = "Hello"
m = dict()
p = Point(x=42, y=5)
m[p] = 'Hello'
from collections import namedtuple
Point = namedtuple('Point', 'x y')

p = Point(42, 5)

m = {p: "Hello"}
use std::collections::HashMap;
let mut map: HashMap<Point, String> = HashMap::new();
map.insert(Point { x: 42, y: 5 }, "Hello".into());
New implementation...
< > ⌨
programming-idioms.org 
Point = Struct.new(:x, :y)
m = {Point.new(42, 5) => "Hello"}
Map<Point, String> m = {};
m[Point(42, 5)] = "Hello";

m := map[Point]string{}
p := Point{x: 42, y: 5}
m[p] = "Hello"
m = dict()
p = Point(x=42, y=5)
m[p] = 'Hello'
Point = namedtuple('Point', 'x y')

p = Point(42, 5)

m = {p: "Hello"}
let mut map: HashMap<Point, String> = HashMap::new();
map.insert(Point { x: 42, y: 5 }, "Hello".into());