我在python上有以下代码:
f = open("configuration.txt", "r")
position = {}
counter = 0
with open("configuration.txt") as fileobj:
for line in fileobj:
for ch in line:
if ch.isdigit():
position[int(ch)] = counter
counter+=1
# print(dict(sorted(position.items())))
position = dict(sorted(position.items()))
diskPositions = list(position.values())
disk = {0:'4',1:'3',2:'2',3:'1'}
pegs = {0:'A',1:'B',2:'C'}
# print(position)
def moveDisks(diskPositions, largestToMove, targetPeg):
for badDisk in range(largestToMove, len(diskPositions)):
currentPeg = diskPositions[badDisk]
if diskPositions[badDisk] != targetPeg:
otherPeg = 3 - targetPeg - currentPeg
moveDisks(diskPositions, badDisk + 1, otherPeg)
print(disk[badDisk], "-", pegs[targetPeg])
diskPositions[badDisk] = targetPeg
moveDisks(diskPositions, badDisk + 1, targetPeg)
break;
moveDisks(diskPositions[::-1], 0, 2)
我需要把这些代码转换成ruby。我开始这样做,但我卡住了,不知道哪里是错误,或我正在做什么不同。你知道吗
当我运行它时,我在第30行收到由nil变量引起的以下错误:
/hanoi/final.rb:30:in `-': nil can't be coerced into Integer (TypeError)```
Ruby代码:
f = open("configuration.txt", "r")
position = {}
counter = 0
def is_digit(look_ahead)
look_ahead =~ /[[:digit:]]/
end
File.open('configuration.txt', 'r') do |f|
f.each_line do |l| # iterate on each character
l.each_char do |c|
if is_digit(c)
position[c.to_i] = counter
end
end
counter+=1
end
end
position = position.sort.to_h
disk_positions = position.values
disk = {0 => '4', 1 => '3', 2 => '2', 3 => '1'}
pegs = {0 => 'A', 1 => 'B', 2 => 'C'}
def moveDisks(diskPositions, largestToMove, targetPeg)
for badDisk in (largestToMove..diskPositions.length)
currentPeg = diskPositions[badDisk]
if diskPositions[badDisk] != targetPeg
otherPeg = 3 - targetPeg - currentPeg
moveDisks(diskPositions, badDisk + 1, otherPeg)
print disk[badDisk].to_s + "-", pegs[targetPeg].to_s
diskPositions[badDisk] = targetPeg
moveDisks(diskPositions, badDisk + 1, targetPeg)
break
end
end
end
moveDisks(disk_positions.reverse, 0, 2)
附言:配置.txt是包含以下行的文本文件:
A-1
B-4:2
C-3
在Python中,内置的
range
函数是不包含的,因此它不返回最后一个数字。Ruby不使用函数,它有几个操作符——两个点形式..
创建一个包含最后一个数字的范围,三个点形式...
不包含高值。有关详细信息,请参见documentation。你知道吗您发布的代码有一些额外的错误,并且不是很习惯用法,但是您的错误是由使用包含式表单引起的,这会导致在索引超出界限时返回nil值。范围
(largestToMove...diskPositions.length)
将与Python函数等效。你知道吗相关问题 更多 >
编程相关推荐