Small function

Deduplication Array

function array_to_heavy(array) {
    new_array=[]
    for (let index = 0; index <array.length; index++) { 
        if(new_array.indexOf(array[index])==-1)                         
        new_array.push(array[index]) }
    return new_array
}          

　　

 

The minimum number of array

Math.min.apply (Math, Array) 
Math.min.apply (null, array)

　　

 

The maximum number of array

Math.max.apply (Math, Array) 
Math.min.apply (null, array)