我有几秒钟。假设是270921。我如何显示该数字以表示是xx天,yy小时,zz分钟,ww秒?
Answers:
可以使用divmod
以下命令非常简洁地完成:
t = 270921
mm, ss = t.divmod(60) #=> [4515, 21]
hh, mm = mm.divmod(60) #=> [75, 15]
dd, hh = hh.divmod(24) #=> [3, 3]
puts "%d days, %d hours, %d minutes and %d seconds" % [dd, hh, mm, ss]
#=> 3 days, 3 hours, 15 minutes and 21 seconds
您可能可以通过利用collect
或进行创意来进一步干燥它inject
,但是当核心逻辑是三行时,这可能会显得过分。
我希望有比使用divmod更简单的方法,但这是我发现的最干燥和可重用的方法:
def seconds_to_units(seconds)
'%d days, %d hours, %d minutes, %d seconds' %
# the .reverse lets us put the larger units first for readability
[24,60,60].reverse.inject([seconds]) {|result, unitsize|
result[0,0] = result.shift.divmod(unitsize)
result
}
end
通过更改格式字符串和第一个内联数组(即[24,60,60]),可以轻松调整该方法。
增强版
class TieredUnitFormatter
# if you set this, '%d' must appear as many times as there are units
attr_accessor :format_string
def initialize(unit_names=%w(days hours minutes seconds), conversion_factors=[24, 60, 60])
@unit_names = unit_names
@factors = conversion_factors
@format_string = unit_names.map {|name| "%d #{name}" }.join(', ')
# the .reverse helps us iterate more effectively
@reversed_factors = @factors.reverse
end
# e.g. seconds
def format(smallest_unit_amount)
parts = split(smallest_unit_amount)
@format_string % parts
end
def split(smallest_unit_amount)
# go from smallest to largest unit
@reversed_factors.inject([smallest_unit_amount]) {|result, unitsize|
# Remove the most significant item (left side), convert it, then
# add the 2-element array to the left side of the result.
result[0,0] = result.shift.divmod(unitsize)
result
}
end
end
例子:
fmt = TieredUnitFormatter.new
fmt.format(270921) # => "3 days, 3 hours, 15 minutes, 21 seconds"
fmt = TieredUnitFormatter.new(%w(minutes seconds), [60])
fmt.format(5454) # => "90 minutes, 54 seconds"
fmt.format_string = '%d:%d'
fmt.format(5454) # => "90:54"
请注意,format_string
这不会让您更改零件的顺序(它始终是最高有效值或最低有效值)。为了获得更精细的控制,您可以split
自己使用和操纵这些值。
需要休息一下。打高尔夫球:
s = 270921
dhms = [60,60,24].reduce([s]) { |m,o| m.unshift(m.shift.divmod(o)).flatten }
# => [3, 3, 15, 21]
Rails有一个可以将时间间隔转换为单词的助手。您可以查看其实现:distance_of_time_in_words
您可以使用针对此问题找到的最简单的方法:
def formatted_duration total_seconds
hours = total_seconds / (60 * 60)
minutes = (total_seconds / 60) % 60
seconds = total_seconds % 60
"#{ hours } h #{ minutes } m #{ seconds } s"
end
您始终可以根据需要调整返回值。
2.2.2 :062 > formatted_duration 3661
=> "1 h 1 m 1 s"
我刚开始写红宝石。我猜这仅适用于1.9.3
def dateBeautify(t)
cute_date=Array.new
tables=[ ["day", 24*60*60], ["hour", 60*60], ["minute", 60], ["sec", 1] ]
tables.each do |unit, value|
o = t.divmod(value)
p_unit = o[0] > 1 ? unit.pluralize : unit
cute_date.push("#{o[0]} #{unit}") unless o[0] == 0
t = o[1]
end
return cute_date.join(', ')
end
我修改了@Mike给出的答案,以根据结果的大小添加动态格式
def formatted_duration(total_seconds)
dhms = [60, 60, 24].reduce([total_seconds]) { |m,o| m.unshift(m.shift.divmod(o)).flatten }
return "%d days %d hours %d minutes %d seconds" % dhms unless dhms[0].zero?
return "%d hours %d minutes %d seconds" % dhms[1..3] unless dhms[1].zero?
return "%d minutes %d seconds" % dhms[2..3] unless dhms[2].zero?
"%d seconds" % dhms[3]
end
天数= 270921/86400(天中的秒数)= 3天,这是绝对值
剩余秒数(t)= 270921-3 * 86400 = 11721
3.to_s + Time.at(t).utc.strftime(":%H:%M:%S")
会产生类似3:03:15:21的内容