Scala 18th Lecture on high-order functions from big Data Novice to Master's journey

From the original Big Data Liaoliang video Video 23 speak
var triple = (x:double) = 3 *x

> triple:double = Double =
Array (3.14,1.42, 2.0). Map ((x:double) = 3 * x)
> res0:array[double] = Array (9.42, 4.26, 6.0)
Array (3.14,1.42, 2.0). map{(x:double) = 3 * x}
> res1:array[double] = Array (9.42, 4.26, 6.0)

Defaddby (factor:double) = (x:D ouble) =>factor + x
> Addby: (factor:double) Double = Double
var total =addby (5)//> total:double = Double =
println (total))//> 25.0

The above is the result of execution in worksheet

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Scala 18th Lecture on high-order functions from big Data Novice to Master's journey