import { assertEquals as assertEq } from "jsr:@std/assert"
assertEq(commonPrefix([
"C:/Hello/World/This/Is/An/Example/Bla.cs",
"C:/Hello/World/This/Is/Not/An/Example/",
"C:/Hello/Earth/Bla/Bla/Bla",
]), "C:/Hello/")
assertEq(commonPrefix([
"C:/Hello/World/This/Is/An/Example/Bla.cs",
"C:/Hello/World/This/is/an/example/bla.cs",
"C:/Hello/World/This/Is/Not/An/Example/",
]), "C:/Hello/World/This/")
assertEq(commonPrefix([
"C:/Hello/World/Users/This/Is/An/Example/Bla.cs",
"C:/Hello/World Users/This/Is/An/example/bla.cs",
"C:/Hello/World-Users/This/Is/Not/An/Example/",
]), "C:/Hello/World")
find the longest common prefix among a list of
inputs.for efficiency, this function starts off by using the shortest string among
inputs, then performs a binary search.