diff options
| -rw-r--r-- | nim.html.markdown | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/nim.html.markdown b/nim.html.markdown index 929d0a74..eca3aa2d 100644 --- a/nim.html.markdown +++ b/nim.html.markdown @@ -12,28 +12,27 @@ efficiency. Nim is efficient, expressive, and elegant. ```nimrod - var # Declare and assign several variables, letter: char = 'n' # with or without type annotations - lang = "Nimrod" + lang = "N" & "im" + n_let : int = len(lang) boat: float truth: bool = false - seconds: int = 42 let # Use let to declare and bind an variable *once*. legs = 400 # legs is immutable. arms = 2_000 # _ are ignored and are useful for long numbers. + aboutPi = 3.15 const # Constants are computed at compile time. This provides debug = true # performance and is useful in compile time expressions. - aboutPi = 3.15 compileBadCode = false when compileBadCode: # `when` is a compile time `if` legs = legs + 1 # This error will never be compiled. - const input = readline(stdin) # const values must be known at compile time. + const input = readline(stdin) # Const values must be known at compile time. -discard 1 > 2 # The compiler will complain if the result of an expression +discard 1 > 2 # Note: The compiler will complain if the result of an expression # is unused. `discard` bypasses this. discard """ @@ -63,7 +62,7 @@ var drinks = @["Water", "Juice", "Chocolate"] # @[V1,..,Vn] is the sequence literal # -# Defining Your Own Types +# Defining Types # # Defining your own types puts the compiler to work for you. It's what makes @@ -73,13 +72,13 @@ type Name = string # A type alias gives you a new type that is interchangable Age = int # with the old type but is more descriptive. Person = tuple[name: Name, age: Age] # Define data structures too. - LongTuple = tuple + AnotherSyntax = tuple fieldOne: string secondField: int var - john: Person = ("John B.", 17) - newage: int = 18 # It would be better to use Age than int + john: Person = (name: "John B.", age: 17) + newage: int = 18 # It would be better to use Age than int john.age = newage # But still works because int and Age are synonyms @@ -166,7 +165,7 @@ of "yes", "Yes": else: echo "That's great; I assume." -# `while`, `if`, `break` +# `while`, `if`, `continue`, `break` import strutils as str # http://nimrod-lang.org/strutils.html echo "I'm thinking of a number between 41 and 43. Guess which!" @@ -176,6 +175,7 @@ var guess: int while guess != number: raw_guess = readLine(stdin) + if raw_guess = "": continue # Skip this iteration guess = str.parseInt(raw_guess) if guess == 1001: echo("AAAAAAGGG!") @@ -207,8 +207,8 @@ for line in splitLines(myString): echo(line) for i, c in myString: # Index and letter. Or `for j in` for just letter - if i mod 2 == 0: continue # Skip rest of iteration - elif c == 'X': break # Compact `if` form + if i mod 2 == 0: continue # Compact `if` form + elif c == 'X': break else: echo(c) # @@ -240,6 +240,10 @@ of aNo: addSugar() # No need for an `else` here. Only `yes` and `no` are possible. +proc pluralize(a: int): string = + if a > 1 or a == 0: return "s" + else: return "" + # # FFI # @@ -249,7 +253,6 @@ of aNo: proc strcmp(a, b: cstring): cint {.importc: "strcmp", nodecl.} var cmp = strcmp("C?", "Easy!") - ``` Additionally, Nim separates itself from its peers with metaprogramming, |