Predefined Functions
Helper functions which provide convenience functions
Function |
Description |
random(n) |
Get a random number in the range [0, n). If n is zero, or not provided, it defaults to 1. |
fac(n) |
n! (factorial of n: "n * (n-1) * (n-2) * … * 2 * 1") Deprecated. Use the ! operator instead. |
min(a,b,…) |
Get the smallest (minimum) number in the list. |
max(a,b,…) |
Get the largest (maximum) number in the list. |
hypot(a,b) |
Hypotenuse, i.e. the square root of the sum of squares of its arguments. |
pow(x, y) |
Equivalent to x^y. For consistency with JavaScript's Math object. |
atan2(y, x) |
Arc tangent of x/y. i.e. the angle between (0, 0) and (x, y) in radians. |
roundTo(x, n) |
Rounds x to n places after the decimal point. |
map(f, a) |
Array map: Pass each element of a the function f, and return an array of the results. |
fold(f, y, a) |
Array fold: Fold/reduce array a into a single value, y by setting y = f(y, x, index) for each element x of the array. |
filter(f, a) |
Array filter: Return an array containing only the values from a where f(x, index) is true. |
indexOf(x, a) |
Return first index of string or array a matching the value x, or -1 if not found. |
join(sep, a) |
Concatenate the elements of a, separated by sep. |
slice(string, start, end |
Create substring from string or array from start to end |
if(c, a, b) |
Function form of c ? a : b. Note: This always evaluates both a and b, regardless of whether c is true or not. Use c ? a : b instead if there are side effects, or if evaluating the branches could be expensive. |
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