sum

问题 This works fine if I sum numbers in JavaScript in an Array. But when I ask their input from User then they are printed as if the numbers are in string. Kindly help me in finding the flaw in my code. var tArr = []; for(var f = 1;f<=4;f++) { // tArr.push(f); var z = prompt("Enter numbers for Sum"); tArr.push(z); } var r = parseInt(tArr); alert(tArr); var summ = 0; for(var w = 0; w< tArr.length; w++) { summ += tArr[w]; } console.log(summ); 回答1: To convert all values to number just do +tArr[w]

问题 I've created a simple table and trying to split data with subtotals. A indicates the subtotal lines. B contains the rows number for previous subtotal. This is just extra field to simplify formulas. C Contains some amounts. D Contains subtotals of amounts between previous and current subtotal line. The subtotal formula has the following view: =ArrayFormula( IF($A2:$A; MMULT( ($B2:$B < TRANSPOSE(ROW($A2:$A))) * (TRANSPOSE(ROW($A2:$A)) < ROW($A2:$A)); IF(ISNUMBER(C2:C); C2:C; 0) ); ) ) The

问题 I have a function that I need to calculate the sum of elements after the diagonal in the 2D array, but the problem is that the function return the sum of the elements in the diagonal. What I need is that if I have a matrix like this: 1 2 3 4 5 6 7 8 9 The elements of the diagonal are = 1 5 9 What I need is to calculate the numbers that follow after these diagonal numbers, so it will be like this: 1 2 3 4 5 6 7 8 9 sum = 2+3+6 = 11 I would appreciate it if someone could help me to fix my

问题 I am trying to give rank column of every group which repeating in every rows within the group of the original table but not the shape of after sum-up. The formula i found in another site but it show an error : https://intellipaat.com/community/9734/rank-categories-by-sum-power-bi Table1 +-----------+------------+-------+ | product | date | sales | +-----------+------------+-------+ | coffee | 11/03/2019 | 15 | | coffee | 12/03/2019 | 10 | | coffee | 13/03/2019 | 28 | | coffee | 14/03/2019 | 1

问题 I have two tables career_types and bookings career_types id | name 1 | foo 2 | bar 3 | baz bookings id | career_type_id | details 1 | 1 | foo 2 | 1 | bar 3 | 2 | baz My bookings table has a lot of entries for all career types except career_types.id of 3. I want a query that will list all my career_types.name's and how many each booking has, and in the case of career_types.id = 1 where there are no bookings for it. I want to return 0. So far I've been trying variations of SELECT career_types

问题 I need to order a MySQL query by the resulting SUM of multiple subqueries. Here's some example code for what I'm trying to do: SELECT ... (SELECT SUM( (SELECT one_result ... LIMIT 1) as plays1, (SELECT one_result ... LIMIT 1) as plays2, (SELECT one_result ... LIMIT 1) as plays3 )) as total_plays FROM plays ORDER BY total_plays Basically, I need to run three subqueries that'll each return an integer. I need to order the entire query by the SUM() of these integers. When I try to run this query

问题 I came pretty close to solving my problem with this answer given by "barry houdini" But I run into problems incorporating it to my needs. =SUMPRODUCT(VALUE(0&SUBSTITUTE(A1:A8,"*",""))) Edit #3 - @Rory came with a very good answer to solving my problem. But what I hadn't thought about was if you enter a non-numerical value inside a cell, then the formula returns an error. So I would really like to tweak the following formula to ignore the letter "x" , or non-numerical values (if that's easier)

问题 Let's say i have a pandas dataframe as below: >>> df=pd.DataFrame({'dt':pd.to_datetime(['2018-12-10 16:35:34.246','2018-12-10 16:36:34.243','2018-12-10 16:38:34.216','2018-12-10 16:42:34.123']),'value':[1,2,3,4]}) >>> df dt value 0 2018-12-10 16:35:34.246 1 1 2018-12-10 16:36:34.243 2 2 2018-12-10 16:38:34.216 3 3 2018-12-10 16:42:34.123 4 >>> I would like to group this dataframe by 'dt' column, but i want to group it in a way that it thinks the values that are less than a second different

问题 I'm trying to do something I feel is quite simple in the grand scheme of things, however I'm clearly missing something. What I have is a simple database named 'localcollection'. What I would like to do is sum up the dollar amount of a column named 'purprice', and setting it as the text of a label (label4). I've been finding variants of code throughout the last couple days that suggest different ways of achieving this. The majority of my digging suggest that using ExecuteScalar is what I want

问题 I'm trying to solve this issue in SQL 2008. I've a table like this: DECLARE @table TABLE ( TimeStamp DATETIME, val INT, typerow VARCHAR(3) ); INSERT INTO @table(TimeStamp, val, typerow) VALUES ('2018-06-03 13:30:00.000', 6, 'out'), ('2018-06-03 14:10:00.000', 8, 'out'), ('2018-06-03 14:30:00.000', 3, 'in'), ('2018-06-03 15:00:00.000', 9, 'out'), ('2018-06-03 15:30:00.000', 4, 'out'), ('2018-06-03 16:00:00.000', 2, 'out'), ('2018-06-03 17:05:00.000', 8, 'in'), ('2018-06-03 17:30:00.000', 0,