import { assertEquals as assertEq } from "jsr:@std/assert"
let fn_call_count = 0
const fn = (arg: string | number) => {
fn_call_count++
return `you owe ${arg} to the bank.`
}
const memorized_fn = memorize(fn)
assertEq(memorized_fn("a camel") , "you owe a camel to the bank.")
assertEq(fn_call_count , 1)
assertEq(memorized_fn("a camel") , "you owe a camel to the bank.")
assertEq(fn_call_count , 1)
assertEq(memorized_fn("5") , "you owe 5 to the bank.")
assertEq(fn_call_count , 2)
assertEq(memorized_fn(5) , "you owe 5 to the bank.")
assertEq(fn_call_count , 3)
assertEq(memorized_fn("your soul"), "you owe your soul to the bank.")
assertEq(fn_call_count , 4)
assertEq(memorized_fn("your soul"), "you owe your soul to the bank.")
assertEq(fn_call_count , 4)
memorize the return value of a single parameter function. further calls with memorized arguments will return the value much quicker.