如果在循环中满足条件，则对 arrays 求和

Question

I am using the code below to create a table. It works fine.

My final goal is to add a sub-total for "de-prioritized". Since I am already looping the table, I wanted to leverage the existing loop. (without looping every value in the array which I am afraid will slow down the code)

For Example If my table is:

[A,de-prioritized,2,1,0,0,1],
[B,de-prioritized,0,2,1,1,0],
[C,other,0,5,2,1,1]

I want to get: [2,3,1,1,1] (as sum of [2,1,0,0,1]+[0,2,1,1,0]).

In other words: Let's say I have a table A1:F10. In A there is a flag (either "de-prioritized" or not), while in B1:F10 there are values. I want to replicate the formula in each column: SUMIF(A1:A10,"de-prioritized",B1:B10),SUMIF(A1:A10,"de-prioritized",C1:C10),SUMIF(A1:A10,"de-prioritized",D1:D10) and so on. I cannot set the formulas because the range in the example above is dynamic. I tried to set the formulaR1C1 with sumif in the script, but it did not work.

I found a similar problem, but I may have n arrays to sum and I am not able to fit the solution in mine: Javascript - Sum two arrays in single iteration

Existing code I have:

  var l = sheet2.getRange('A1').getValue();
  for (var i = 0; i<l ;i++) {
    if (sheet3.getRange(i+3,2).getValue() == 'de-prioritized') { 
      sheet3.getRange(i+3,1,1,sheet3.getLastColumn()).setBackgroundRGB(250, 240, 230);
    } else sheet3.getRange(i+3,1,1,sheet3.getLastColumn()).setBackgroundRGB(225, 247, 232)
  }

Answer 1

• You want to retrieve [2,3,1,1,1] from [["A","de-prioritized",2,1,0,0,1],["B","de-prioritized",0,2,1,1,0],["C","other",0,5,2,1,1]] using Google Apps Script.

Sample script:

const arr = [["A","de-prioritized",2,1,0,0,1],["B","de-prioritized",0,2,1,1,0],["C","other",0,5,2,1,1]];
const res = arr.reduce((ar, [,b,...cdefg]) => {
  if (b == "de-prioritized") ar = ar.length > 0 ? ar.map((e, i) => e + cdefg[i]) : cdefg;
  return ar;
}, []);
console.log(res) // <--- [2,3,1,1,1]

Test of script:

 const arr = [["A","de-prioritized",2,1,0,0,1],["B","de-prioritized",0,2,1,1,0],["C","other",0,5,2,1,1]]; const res = arr.reduce((ar, [,b,...cdefg]) => { if (b == "de-prioritized") ar = ar.length > 0? ar.map((e, i) => e + cdefg[i]): cdefg; return ar; }, []); console.log(res)

References:

• reduce()
• Spread syntax
• Destructuring assignment