Ruby タイムスタンプ ヘルパー

# Get current timestamp (seconds)
timestamp = Time.now.to_i
puts timestamp # 1729584000

# Get timestamp with milliseconds
timestamp_ms = (Time.now.to_f * 1000).to_i
puts timestamp_ms # 1729584000000

# Using DateTime
require 'date'
dt = DateTime.now
puts dt.to_time.to_i

# From Unix seconds
timestamp = 1729584000
time = Time.at(timestamp)
puts time # 2024-10-22 01:20:00 +0000

# From milliseconds
timestamp_ms = 1729584000000
time_ms = Time.at(timestamp_ms / 1000.0)
puts time_ms

# Format the time
formatted = time.strftime('%Y-%m-% %H:%M:%S')
puts formatted # "2024-10-22 01:20:00"

require 'time'
require 'date'

# Parse ISO 8601
str = "2024-10-22T01:20:00Z"
time = Time.parse(str)
puts time.to_i # 1729584000

# Parse custom format
time2 = Time.strptime("2024-10-22 01:20:00", "%Y-%m-%d %H:%M:%S")
puts time2.to_i

# Using DateTime
dt = DateTime.parse("2024-10-22 01:20:00")
puts dt.to_time.to_i