Syntax
- float[] base : limit
- float[] base : increment : limit
Note:
The colon operator is only available as a parameter for the array initialization function and the index operator (inside a bracket [] notation).
Parameters
- base—floatStarting value of sequence.
- increment—floatSuccessively added value to base. Must be positive for an ascending sequence base<=limit or negative for a descending sequence base>=limit. Default is 1.
- limit—floatMaximum/minimum value which is not exceeded.
Returns
An array containing a sequence of float values
[ base, base + increment, base + 2*increment, ... ]
where the last element does not exceed limit.
Parameters base, increment and limit are given in a colon-separated notation.
Note:
The size of the returned array is limited. It can be configured in the Procedural Runtime preferences (Default: 100000).
Related
Example
Binary colon operator
const a = [2 : 4] // (3)[2,3,4]
const b = [0.5 : 3] // (3)[0.5,1.5,2.5]
const c = [4 : 2] // (0)[]
Ternary colon operator
const a = [1 : 0.5 : 3] // (5)[1,1.5,2,2.5,3]
const b = [4 : -1 : 2] // (3)[4,3,2]
const c = [1 : -0.5 : 2] // (0)[]
const d = [1 : -0.5 : 1] // (1)[1]
const e = [1 : 0 : 1] // (0)[]
Floating point imprecision
The computation of sequence values base+i*increment suffers from floating point imprecision. Their exact values might be unexpected. This is not always noticeable when printing values due to an implicit rounding.
const a = [0 : 0.15 : 0.5]
Init --> print(a) // (4)[0,0.15,0.3,0.45]
print(a[3] == 0.45) // false
print(abs(a[3] - 0.45) < 1e-10) // true