tests/example_string.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2004-2008 Jean Privat <jean@pryen.org>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # A procedural program (without explicit class).
  18 # It displays the value of a local variable.
  19 # It exhibs ways to concatenate strings.
  20
  21 var a = 10
  22 # First way: Multiple parameters.
  23 # Pro: Simple.
  24 # Con: Only for multi parameters methods.
  25 printn("The value of a is: ", a, ".\n")
  26
  27 # Second way: Build a string and display it.
  28 # Pro: Eiffel way (rigourous).
  29 # Con: Eiffel way (heavy).
  30 var s = "The value of a is: "
  31 s.append(a.to_s)
  32 s.append(".\n")
  33 printn(s)
  34
  35 # Third way: Use a intern string evaluation.
  36 # Pro: Script way (easy).
  37 # Con: Script way (unreadeable on complexes cases).
  38 printn("The value of a is: {a}.\n")
  39
  40 # Fourth way: String concatenation
  41 # Pro: Easy.
  42 # Con: Unefficient (slow and consumes memory).
  43 printn("The value of a is: " + a.to_s + ".\n")
  44
  45 # Fiveth way: Join arrays.
  46 # Pro: Sometime efficient on complex concatenation.
  47 # Con: Crazy.
  48 printn(["The value of a is: ", a.to_s, ".\n"].join(""))