findFirst function (Builtin)

Syntax

• float findFirst(array, value)
• float findFirst(array, value, epsilon)

Parameters

1. array—(float[], bool[], string[])
   Array for which an index of a value is requested. For float arrays an epsilon must be specified.
2. value—(float, bool, string)
   Value to look for.
3. epsilon—float
   (Only applicable for float arrays) A tolerance in which float values are considered to be equal. Can be specified in order to deal with floating point imprecision.

Returns

Zero-based index of the first occurrence of value in array. If value is not found, -1 is returned.

Related

• Array types operators
• findFirst function (Utility)
• array initialization function
• sortIndices function
• sortRowIndices function

Example

Basic example

const array1d = [1,2,3,4]
const array2d = [1,2,3;4,5,6]

Example --> print(         findFirst(array1d, 2, 0)  )  // 1
            print(array1d[ findFirst(array1d, 2, 0) ])  // 2
			
            print(         findFirst(array2d, 4, 0)  )  // 3
            print(array2d[ findFirst(array2d, 4, 0) ])  // 4

Use float epsilon

const indices = comp(e) { all : scope.sx }

Example --> print(indices)                     // (4)[6,8.1,6,8.1]
            print(findFirst(indices, 8, 0.5))  // 1