Fly is dynamically typed interpreted programming language. You can use the following types in Fly:
int, float, string, array and bool. All variables can be any type but not all types are automatically converted to one another.
Here you can see a few variable assignment and type examples:
my_int = 100;
my_float = 1.53;
my_string = "Hello World!";
my_array = [1, 2, 3, 5, 7, 11, 13, 17];
no_value = nil;
my_bool = false;
All variable values except false and nil are also true when put in a condition statement (if, elif, else, for).
There are 4 kinds of block statements (if, elif, else and the for loop):
if my_int {
// if my int is not false/nil
print(my_int);
}
elif my_int == 99 {
print("This is a elif statement");
}
else{
print("my_int is something else");
}
i = 0;
for i < 10 {
print(i);
i += 1;
}
You can use (dynamic) arrays to store multiple values in 1 type. Arrays have a dynamic size which changes as items are added. You can also define variables with a different initial size than the default (24), this is good to use for better performance on a lot of array operations. Here are some array examples:
fruits = ["Apple", "Pear", "Lime", "Banana"];
print("I know " + fruits.count() + " fruits!");
numbers = [](100, 10); // This array has a length of 100 and adds 10 items when it resizes.
i = 0;
for i < 100 {
numbers[i] = "item " + i;
i += 1;
}
// Push an item onto an array:
fruits += "Kiwi";
fruits.insert(0, "Strawberry"); // Inserts object at the given index
fruits.remove(0);
If you want to take a part from an array (aka splicing) you can use the following:
items = [0, 1, 2, 3, 4];
items_part1 = items[0:2]; // takes items with index 0 from including 2
items_part2 = items[3:]; // takes items with index 3 and higher
Here are some functions examples:
box add_2_items(a, b){
return a + b;
}
print(add_2_items(10, 30)); // 40
Fly has a few builtin libraries and functions:
print(arg1) prints arg1 to the console
print("Hello World") // Hello World
input() reads a line from the console input and returns it as a string
line = input() // reads a line
obj.count() counts the items in a variable (with obj as variable)
[1, 2, 3].count() // 3
import the libraries using and import statement; for example:
import math, text
usage example:
floor(float)
ceiling(float)
sin(float)
cos(float)
tan(float)
asin(float)
acos(float)
atan(float)
sqrt(float)
log(float)
logx(float y, float x)
log10(float)
power(float base, float exponent)
power(float decimal, int decimalDigits)
usage example:
items = text.split("1,2,3,4", ","); // ['1', '2', '3', '4']
split(string input, string seperator);
replace(string source, string target, string replaceWith)
join(array items, string separator);