Question

我基本上已经完成了Zed Shaw对Ruby课程的介绍。然而，我陷入了这个练习的障碍，他给了我一段代码并要求我解决它。很多错误都是语法错误的，但有些编码的错误是我无法理解的。

我得到的错误如下：

ex26.rb：76：语法错误，意外'）'，期待'='

ex26.rb：99：语法错误，意外的$ end，期待'）'

代码：

# This function will break up words for
def break_words(stuff)
    words = stuff.split(' ')
    return words
end

# Sorts the words.
def sort_words(words)
    return sorted(words)
end

# Prints the first word after popping it off.
def puts_first_word(words)
    word = words.poop(0)
    puts word
end

# Prints the last word after popping it off.
def puts_last_word(words)
    word = words.pop(-1)
    puts word
end

# Takes in a full sentence and returns the sorted words.
def sort_sentence(sentence)
    words = break_words(sentence)
    return sort_words(words)
end

# Puts the first and last words of the sentence.
def puts_first_and_last(sentence)
    words = break_words(sentence)
    puts first_word(words)
    puts last_word(words)
end

# Sorts the words then prints the first and last one.
def puts_first_and_last_sorted(sentence)
    words = sort_sentence(sentence)
    puts first_word(words)
    puts last_word(words)
end


puts "Let's practice everything."
puts 'You\'d need to know \'bout escapes with \\ that do \n newlines and \t tabs.'

poem = <<POEM
\tThe lovely world
with logic so firmly planted
cannot discern \n the needs of love
nor comprehend passion from intuition
and requires an explantion
\n\t\twhere there is none.
POEM


puts "--------------"
puts poem
puts "--------------"

five = 10 - 2 + 3 - 6
puts "This should be five: %s" % five

def secret_formula(started)
    jelly_beans = started * 500
    jars = jelly_beans / 1000
    crates = jars / 100
    return jelly_beans, jars, crates
end

start_point = 10000
beans, jars, crates = secret_formula(start-point)

puts "With a starting point of: %d" % start_point
puts "We'd have %d jeans, %d jars, and %d crates." % (beans, jars, crates)

start_point = start_point / 10

puts "We can also do that this way:"
puts "We'd have %d beans, %d jars, and %d crabapples." % secret_formula(start_point)


sentence = "All good\tthings come to those who wait."

words = ex25.break_words(sentence)
sorted_words = ex25.sort_words(words)

puts first_word(words)
puts last_word(words)
puts first_word(sorted_words)
puts last_word(sorted_words)
sorted_words = ex25.sort_sentence(sentence)
print sorted_words

puts first_and_last(sentence)

puts first_and_last_sorted(sentence)

Answer 1

首先查看对secret_formula的来电;如果没有别的，你可能会在其中一个中输入错字。

其中一个错别字是puts的论据;它包含在错误的字符中。

Answer 2

你还得到了：

# Prints the first word after popping it off.
def puts_first_word(words)
    word = words.poop(0)
    puts word
end

声明的 .poop（）方法在哪里？

Answer 3

另外，对于句子的第一个单词：

# Prints the first word after popping it off.
def puts_first_word(words)
    word = words.poop(0)
    puts word
end

不仅存在拼写错误，而且如您所见，.pop用于获取句子中的最后一个单词。你能找到类似的功能来获得第一个字吗？

（提示：我们之前在运动中使用它）

坚持Zed Shaw的红宝石练习

3 个答案: