62
votes
5
answers
2.4K
views
Why does GCC use multiplication by a strange number in implementing integer division?
I've been reading about div and mul assembly operations, and I decided to see them in action by writing a
63
votes
6
answers
1.9K
views
What is the behavior of integer division?
For example, int result; result = 125/100; or result = 43/100; Will result always be the floor of the
58
votes
11
answers
501
views
Safest way to convert float to integer in python?
Python's math module contain handy functions like floor & ceil. These functions take a floating point
48
votes
19
answers
452
views
Mapping two integers to one, in a unique and deterministic way
Imagine two positive integers A and B. I want to combine these two into a single integer C. There can be no
62
votes
7
answers
937
views
Why is division in Ruby returning an integer instead of decimal value?
For example: 9 / 5 #=> 1 but I expected 1.8. How can I get the correct decimal (non-integer) result? Wh
62
votes
30
answers
1.2K
views
Designing function f(f(n)) == -n
A question I got on my last interview: Design a function f, such that: f(f(n)) == -n Where n is a 3
52
votes
18
answers
1.6K
views
How to perform an integer division, and separately get the remainder, in JavaScript?
In JavaScript, how do I get: The whole number of times a given integer goes into another? The remainder?
57
votes
29
answers
1.5K
views
How do I parse a string to a float or int?
In Python, how can I parse a numeric string like "545.2222" to its corresponding float value, 545.2222? Or par
55
votes
30
answers
2.2K
views
How do I generate random integers within a specific range in Java?
How do I generate a random int value in a specific range? I have tried the following, but those do not work: A
