same_length: Same Length
In tester: Tests and checks characteristics of R objects

same_length() tests if two objects have same length
different_length() tests if two objects have different length

1	same_length(x, y)

`x`	a matrix
`y`	a matrix

same_length(1:10, letters[11:20]) # TRUE
same_length(1:10, letters[11:19]) # FALSE

a = matrix(1:15, 5, 3)
same_length(a, a) # TRUE
same_length(a, t(a)) # TRUE

different_length(t(a), a) # FALSE
different_length(1:10, a) # TRUE
different_length(a, "a") # TRUE