sum Questions
3
Solved
I have two tables in a derby database that I want to query together.
Orders
+----+--------+--------------+------------+
| ID | UserID | PurchaseDate | TotalPrice |
+----+--------+--------------+--...
5
Solved
I saw a question on a math forum a while back where a person was discussing adding up the digits in a number over and over again until a single digit is achieved. (i.e. "362" would become "3+6+2" w...
6
Solved
If I have a dataframe similar to this one
Apples Bananas Grapes Kiwis
2 3 nan 1
1 3 7 nan
nan nan 2 3
I would like to add a column like this
Apples Bananas Grapes Kiwis Fruit Total
2 3 nan 1 6
...
3
Solved
I'm trying to make a sum of a column in a csv file. The file looks like:
Date Value
2012-11-20 12
2012-11-21 10
2012-11-22 3
This can be in the range of hundreds of rows. I need to get the total...
10
if i just read my sum_digits function here, it makes sense in my head but it seems to be producing wrong results. Any tip?
def is_a_digit(s):
''' (str) -> bool
Precondition: len(s) == 1
Retur...
5
Solved
I have a very large dataframe in R and would like to sum two columns for every distinct value in other columns, for example say we had data of a dataframe of transactions in various shops over a da...
Jaxartes asked 2/8, 2012 at 16:40
4
Solved
i am figuring out a way to get the sum of values of classes which are contained in an array. My setup is as follows:
class CustomClass {
var value: Int?
init(value: Int) {
self.value = value
}...
8
Solved
I am newbie.
I want to make small app which will calculate the sum of all the digits of a number.
For example, if I have the number 2568, the app will calculate 2+5+6+8 which is equal with 21. Fi...
Duelist asked 12/7, 2016 at 16:40
5
Solved
I have multiple JavaScript objects:
{
a: 12,
b: 8,
c: 17
}
and
{
a: 2,
b: 4,
c: 1
}
I need to sum these two object by keys
Result:
{
a: 14,
b: 12,
c: 18
}
Do you have any solutions in J...
Unmannerly asked 27/2, 2017 at 14:20
7
Solved
I have a model:
class ItemPrice(models.Model):
price = models.DecimalField(max_digits=8, decimal_places=2)
# ...
I tried this to calculate the sum of price in this queryset:
items = ItemPrice.ob...
Erickson asked 23/12, 2011 at 12:55
6
I have a dataframe that has lots of columns that are something like this:
data <- data.frame (a.1 = 1:5, a.2b = 3:7, a.5 = 5:9, bt.16 = 4:8, bt.12342 = 7:11)
I'd like a result with columns that...
3
Solved
Consider this class:
case class Person(val firstName: String, val lastName: String, age: Int)
val persons = Person("Jane", "Doe", 42) :: Person("John", "Doe", 45) ::
Person("Joe", "Doe", 43) :...
Byte asked 21/2, 2011 at 9:45
10
Solved
Is there an efficient algorithm to split up a number into N subsections so that the sum of the numbers adds up to the original, with a base minimum? For example, if I want to split 50 into 7 subsec...
Choric asked 16/10, 2011 at 23:42
4
In Redis DB, I have many key in String type to save downloads time within a application,
example:
Key value
20131028:1 100
20131028:2 15
20131028:3 10
..........
I want to sum all value of all ke...
3
Solved
As duration of a task, suppose that we have a column with cells formatted as MM:SS that would like to convert to seconds. Mathematically speaking, the solution is simple. We just need to compute MM...
Whirly asked 30/6, 2022 at 18:46
25
time_interval = [4, 6, 12]
I want to sum up the numbers like [4, 4+6, 4+6+12] in order to get the list t = [4, 10, 22].
I tried the following:
t1 = time_interval[0]
t2 = time_interval[1] + t1
t...
Hughes asked 8/4, 2013 at 21:15
6
Solved
I am using the following sample code to calculate sum of two different time values. Now I want to get the sum of N number of time values.
// numbers for testing
$o="12:59";
$p="0:58";
// display ...
5
Solved
Time started time end Duration
6:02:53 PM 6:11:07 PM 0:08:13
6:11:22 PM 6:20:33 PM 0:09:11
6:20:48 PM 6:32:21 PM 0:11:34
6:32:44 PM 6:39:04 PM 0:06:20
6:39:28 PM 7:00:41 PM 0:21:13
7:01:00 PM 7:09:...
Helsie asked 27/2, 2020 at 19:8
8
Solved
I have a list of integers and I need to count how many of them are > 0.
I'm currently doing it with a list comprehension that looks like this:
sum([1 for x in frequencies if x > 0])
It seems ...
Pinafore asked 24/5, 2010 at 20:26
7
I have an array:
my_array = [1, 4, 1, 13, 9]
and would like to create a new array that for each index in my_array is the sum of all the previous index values
summed_array = [0, 1, 5, 6, 19]
I...
Almondeyed asked 24/11, 2015 at 1:10
5
I have a list or an array of decimal numbers in Python. I need to round them to the nearest 2 decimal places as these are monetary amounts. But, I need the overall sum to be maintained, i.e. the su...
6
Solved
I already read (this), but couldn't figure out a way to implement it to my specific problem. I know SUM() is an aggregate function and it doesn't make sense not to use it as such, but in this speci...
4
Solved
I am a beginner in programming. I want to do the sum of all elements in an array. I made this but I can't see where are my mistakes?
function ArrayAdder(_array) {
this.sum = 0;
this.array = _arr...
Sisely asked 16/1, 2016 at 18:5
4
Solved
In MySQL - What is the difference between using SUM or COUNT?
SELECT SUM(USER_NAME = 'JoeBlow')
SELECT COUNT(USER_NAME = 'JoeBlow')
5
Solved
I have the following command which returns the filenames and lengths of mp3s files:
mp3info -p "%f: %m:%02s\n" *.mp3
How can I use this in a bash script to return the total length (sum) of all m...
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