The remainder of the quotient of two numbers (usually integers).
Questions tagged [modulus]
847 questions
2
votes
2 answers
Solving modular linear congruences for large numbers
I'm looking for a better algorithm than one I found on stackoverflow to handle 4096 byte numbers, i'm hitting a maximum recursion depth.
Code from stackoverlow post, i copy/pasted it but lost the original link:
def linear_congruence(a, b, m):
if…
oppressionslayer
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2
votes
2 answers
How does this if statement determine whether num%2 is true or false
Okay, so here is a piece of code. The function of the code is to take a value and determine whether or not it is odd or even.
def isEvenOrOdd(num):
return 'odd' if num % 2 else 'even'
Now my question lies in why this works. The way I am…
imanidiot
- 37
- 4
2
votes
1 answer
Modulus Function to Avoid Integer Overflow in C++
If I have 2 int or long long variables, call them a and b, and I want to compute the sum (a + b) mod p, where p is a large prime integer, how can I utilize the modulo operator in C++ to achieve the desired result?
I have tried (a + b) % p, but this…
coder_jam
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2
votes
1 answer
Why is this modular arithmetic incorrect in my rotate string function?
I am writing a rotate string function in C. The intended behavior is that the strings chars will be rotated using a modulus of the string length, and a key. The function seems to work in the forward direction, but if I specify a negative key, I want…
the_endian
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2
votes
1 answer
How does the modulus operator handle strings in Javascript
I know how modulus works in general, but it is not clear to me how the operator handles strings.
Recently, I had to write a script which checks if a name (string) contains an even number of letters. This actually worked, using modulus 2 and checking…
0x4e696b
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2
votes
4 answers
JavaScript - Wrap every 3 items from an array to a div
I have an array consists 50 items.
I want to wrap every 3 items to a
.
I'm cracking my head trying to achieve this but I can't get it to work
var cards = [];
for(var i=0; i < 50; i++){
cards.push('
jenna_3108
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votes
3 answers
Complete loss of accuracy in modulus when calculating with very large numbers
I have the following problem:
> 1e20 %% 3
[1] 0
Warning message:
probable complete loss of accuracy in modulus
The result can't be correct and I'm sure it is because 1e20 is really big. But I want to solve calculations like this in R. Is there a…
TobiSonne
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votes
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Sawtooth wave Function for integers Javascript
Saby people, I'm trying to write the function which will map
this --> ...-5|-4|-3|-2|-1| 0| 1| 2| 3| 4| 5| 6| 7| 8| 9...
to this --> ... 3| 0| 1| 2| 3| 0| 1| 2| 3| 0| 1| 2| 3| 0| 1...
Ideally if I enter myFunc(-1,4) it will return 3
the second…
Manvel A.
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2
votes
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How do you form the opposite statement of an 'any' condition?
I have the following code which works
[i for i in range(1, 16) if any(i % j == 0 for j in [3,5])]
This has an output of
[3, 5, 6, 9, 10, 12, 15], the numbers that can be divided by either 3 or 5.
However, when I try
[i for i in range(1, 16) if any(i…
Thanos Dodd
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2
votes
2 answers
Difference between modulus and remainder
I am doing some calculations with % operator in java and python.
While doing calculations, i found out that % operator works differently in both languages when dealing with negative numbers.
For example
-21 % 4 = -1 // Java
-21 % 4 = 3 #…
user7500403
2
votes
2 answers
How to read then parse with split and write into a text file?
I'm struggling to get readline() and split() to work together as I was expecting. Im trying to use .split(')') to cut down some data from a text file and write some of that data to a next text file.
I have tried writing everything from the line.
I…
HYUTS
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votes
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How to get Modulo of a String in Pyspark
I'd like to calculate for an alphanumeric DataFrame column the relative modulo.
In pure Python I could do something like int(str, base) to convert it to a numeric value. Then simply applying the modulo %.
For example:
>>>…
Vzzarr
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2
votes
1 answer
Understanding Mod Operator in Math vs Programming
From what I understand, in mathematics, the mod operator is the result of the remainder of Euclidean division. Where 0 ≤ r < |b|, meaning that the result will always be positive.
In programming however, there are operators in many languages which…
csguy
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votes
1 answer
Adding integers to an ArrayList depending on the modulus of their indexes
import java.util.*;
public class AddingIntegers{
public static void main(String []args){
ArrayList list = new ArrayList<>(Arrays.asList(10,20,30));
add(list);
}
public static void add(ArrayList list)…
Felicity-MB
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2
votes
2 answers
How to find A%B for A and B are very large numbers (stored in string)
If I have two numbers A and B and I want to compute A%B for A and B are very large (as large as 10^100), both are stored in strings, how can I achieve that?
Youssef Walid
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