Search code examples
javascriptgoogle-chrome-console

Javascript: sum all values of a table row in Chrome console

In my Chrome console, I have a table called data which has 23 rows and look like this: data table in Chrome console

enter image description here

Then I select the first row with data[0], it looks like this: data[0]

enter image description here

My objective is to sum all the values of this row (and each row), how to do this?

Thank you,

Solution

  • This will sum the values in each row of data, except the hour value, which is a date.

    var sums = Array.prototype.slice.call(data, 0).map(function(item) {
  return Object.keys(item)
    .filter(function (key) { return key !== 'hour'})
    .reduce(function(total, key) {
      return total + item[key]
    }, 0)
})

    data is an array-like object, so we call slice on it first to return an array. Next we map each item in the array. This mapping is a sum of all the values of each element in the array, except for hour, which is a date, so it gets filtered out of the keys list. The final value of sums is an array of totals from each object in data.