Category talk:Wren-math: Difference between revisions
→Source code: Added various integer root functions..
(Added evalPoly and diffPoly methods to Math class.) |
(→Source code: Added various integer root functions..) |
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Line 153:
static mod(x, y) { ((x % y) + y) % y }
// Returns
static
var s = n.sqrt.floor▼
return s * s == n▼
} ▼
// Returns
static
var c = n.cbrt.truncate▼
// Returns the integer 'n'th root of 'x' or null if 'x' is negative and 'n' is even.
return c * c * c == n▼
static root(n, x) {
if (!(n is Num) || !n.isInteger || n < 1) {
Fiber.abort("n must be a positive integer.")
}
return (n == 1) ? x :
(n == 2) ? sqrt(x) :
(n == 3) ? cbrt(x) :
(n % 2 == 1) ? x.sign * x.abs.pow(1/n).floor :
(n >= 0) ? x.pow(1/n).floor : null
// Returns whether or not 'x' is a perfect square.
static isSquare(x) {
}
// Returns whether or not 'x' is a perfect cube.
static isCube(x) {
}
// Returns whether or not 'x' is a perfect 'n'th power.
static isRoot(n, x) {
var r = root(n, x)
return r.pow(n) == x
}
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