Sketch

Sketch is a language intended for fun.
It has a Kotlin-style syntax.

Sketch uses an AST-type parser to evaluate code.

val date = 07;
val goodboy = true;

fun today() {
  if (  goodboy ) {  print("apologize!");  }
  else {    delay();    };
};

fun delay() {
  date++;
  today();
};
today();

The above code is an example. It'll print Apologize if good boy or it will go on forever because the day never comes.

Variable

val text = "Hello, World!";

Sketch supports four types of values - strings, numbers, booleans (true/false), null and array.

val happy = true;
if (happy) {    happy = null;   };

Arrays

val array = array(7);
array[0] = 7;

for x (1 -> len(array) - 1) {
    array[x] = array[x - 1] * 2;
}
printf(array);

prints [7.0, 14.0, 28.0, 56.0, 112.0, 224.0, 448.0]

Conditions

There are two types of condition checks, i.e. ternary operator and if else.

if (happy) {
  print("Happy Day :D");  
} else {
  print("Oh, No :(");  
};

Inline operator (ternary).
Syntax [condition] then [expression] or [expression]

print(happy then "Hello, World" or "No :/");

Functions

You can define a function in sketch.
null is the default value if you don't return anything.

fun hello(arg) {
    if (arg != 7 && arg + 2 == 10) {
        return "that was right";
    };
    return "Ah, No";
};

print( hello(8) );

Loops

Yes, 😉 Sketch supports two types of loops - for loop and while loop.

fun hello(arg) {
    for x (1 <- 7) {
        print(x);
        if (x == 5) {  break;  };
    };
};

print( hello(8) );

It also supports forward statement, which can be used to forward loop x times.

fun hello() {
    for x (1 <- 7) {
        print(x);
        if (x == 5) {  forward 2;  };
    };
};
hello();

Reverse loop can be performed through <- symbol. -> for a forward loop.

val x = 7;
while (x > 0) {
    print("value of x " + --x);
};

Import

with Sketch.systemTime clock;

fun fib(n) {
  if (n < 2) {
    return n;
  }
  return fib(n - 1) + fib(n - 2);
}

val before = clock();
print(fib(40));
print(clock() - before);

Internal functions can be implemented with the use of with statement.
with <from> <function> <optional_function_rename>

Running

You can clone the repository, run the Main file or use the jar file from the releases.