Top "Division" questions

how to do two complement multiplication and division of integers?

I have read this post on binary multiplication using two complement. but it is not very clear to me. Even …

binary division multiplication bits twos-complement

Java, BigDecimal. Problems with division

I'm trying to calculate a percentage "factor". That is, given a 20%, convert it into 0.2 (my intention is to later multiply …

java division bigdecimal

How to divide the value of pandas columns by the other column

I have a dataframe: >>> dt COL000 COL001 QT STK_ID RPT_Date STK000 20120331 2.6151 2.1467 1 20120630 4.0589 2.3442 2 20120930 4.4547 3.9204 3 20121231 4.1360 3.8559 4 STK001 20120331 -0.2178 0.9184 1 20120630 -1.9639 0.7900 2 20120930 -2.9147 1.0189 3 20121231 …

pandas division

What's the fastest way to divide an integer by 3?

int x = n / 3; // <-- make this faster // for instance int a = n * 3; // <-- normal integer multiplication int b = (…

optimization bit-manipulation division

Find multiples of a number in PHP

I want to find all muliples of a number in PHP. I'm using something like this if($count != 20 ) to work …

php division modulus

cannot convert from double to float

In my database, I have a couple of "real" fields. Heres the structure: database.execSQL("create table " + TABLE_LOGS + " (" + COLUMN_…

android integer division

How to manage division of huge numbers in Python?

I have a 100 digit number and I am trying to put all the digits of the number into a list, …

python floating-point integer division

Unexpected result in long/int division

I have values like this: long millis = 11400000; int consta = 86400000; double res = millis/consta; The question is: why res equals 0.0 (instead …

java int double division

C# is rounding down divisions by itself

When I make a division in C#, it automaticaly rounds down. See this example: double i; i = 200 / 3; Messagebox.Show(i.…

c# division

Should I bit-shift to divide by 2 in Java?

Possible Duplicates: Is shifting bits faster than multiplying and dividing in Java? .NET? Quick Java Optimization Question Many years ago …

java performance bit-manipulation division bit-shift