You are given an array of up to four non-negative integers, each less than 256.
Your task is to pack these integers into one number M in the following way:
The first element of the array occupies the first 8 bits of M;
The second element occupies next 8 bits, and so on.
Return the obtained integer M as unsigned integer.
- Note:
the phrase "first bits of M" refers to the least significant bits of M - the right-most bits of an integer. For further clarification see the following example.
For a = [24, 85, 0], the output should be 21784
An array [24, 85, 0] looks like [00011000, 01010101, 00000000] in binary.
After packing these into one number we get 00000000 01010101 00011000 (spaces are placed for convenience), which equals to 21784.
[input]integer arraya
Constraints: 1 ? a.length ? 4 and 0 ? a[i] < 256
[output]an unsigned integer
- Are you a One-Liner? Please try to complete the kata in one line(no test for it)