function

Documentation

Index

• Variables
• func MakeGetReturnElementAt(index int) func(...interface{}) interface{}

Variables

var GetFirstReturnElement = MakeGetReturnElementAt(0)

var GetLastReturnElement = MakeGetReturnElementAt(-1)

Functions

func MakeGetReturnElementAt

func MakeGetReturnElementAt(index int) func(...interface{}) interface{}

MakeGetReturnElementAt Returns a function which, if provided multiple arguments, returns the argument at position index. May be used on functions that return multiple values but where we want to ignore all except one. Example: func do() (int64, string, error) { return 0, "", errors.New("error") } Example 1: MakeGetReturnElementAt(0)(do()).(int64) // yields the first element, i.e., just the int64 and ignores the string and the error (you will have to check if this can be done safely) Example 2: MakeGetReturnElementAt(-1)(do()).(error) // yields the last element, i.e., just the error and ignores the int64 and the string.