Ruby: Convert time to seconds?

Question

How can I convert a time like 10:30 to seconds? Is there some sort of built in Ruby function to handle that?

Basically trying to figure out the number of seconds fro

Answer 1

In plain ruby the fastest is the sum of time parts:

require 'benchmark'
require 'time'

Benchmark.bm do |x|
  x.report('date') { 100_000.times { Time.now.to_i - Date.today.to_time.to_i } }
  x.report('parse') { 100_000.times { Time.now.to_i - Time.parse('00:00').to_i } }
  x.report('sum') { 100_000.times { Time.now.hour * 3600 + Time.now.min * 60 + Time.now.sec } }
end

       user     system      total        real
date  0.820000   0.000000   0.820000 (  0.822578)
parse  1.510000   0.000000   1.510000 (  1.516117)
sum  0.270000   0.000000   0.270000 (  0.268540)

So, here is a method that takes timezone into account, if needed

def seconds_since_midnight(time: Time.now, utc: true)
  time = time.utc if utc
  time.hour * 3600 + time.min * 60 + time.sec
end