DEF
twitter_data
[{"LaunchAcademy"=>
{"description"=>
"A 10 week, intensive bootcamp teaching you how to code with a focus on Ruby on Rails",
"last twenty tweets"=>
["RT @chrisccerami: While learning web development I created a map of all of the shows @Screamales have played and damn @DonGiovanniRecs http…",
"6 ways to quantify your code and why you need to do it: by @kevinrcasey ,
"Do more of what you want at work. How to create productive partnerships: by @benvoss",
"RT @Pistachio: SO rad. bunch of local women learning to code with @gdiBoston at @HubSpot right now: ,
"RT @STWatkins78: Huge breakthrough on my breakable toy today...can upload local file to soundcloud from my app...time for a beer! #LaunchAc…",
"Just say yes to opportunities, especially if they scare you. great advice by @kerry_benjamin1",
"How the internet is changing software and business, using Ruby as an example: by @ukitazume ,
"RT @chrisccerami: @JustusEapen @LaunchAcademy @MarsCuriosity ,
"Come build some interesting projects! @womenwhocode Hack Night tomorrow. RSVP:,
"RT @SpencerCDixon: One of the greatest parts of being a developer is the massive amount of control you have over a computer. Feels very emp…",
"7 reasons to love Minitest for testing Ruby code: by @FluxusFrequency, a graduate from our friends @gschool",
"Interested in becoming a game developer? Here's how: via @skilledup ,
"Web developer hiring trends, and what they mean for you: by @walesmd ,
"RT @chrisccerami: I recently built my first API in Rails which I hope makes photos from Mars courtesy of @MarsCuriosity more accessible to …",
"Build things that last. Make sure your work lives beyond you. by @acolangelo",
"Thanks to everyone who came to Ship It! Saturday! Check out the latest blog post for a recap:,
"Write your code as if your best friend's inheriting it by @MGraybosch,
"Coding can improve the way we run the world. Old, but inspiring TED talk by @pahlkadot: ,
"Practicing pitches and getting ready for Career Day, coming up on January 27th and 28th! ,
"RT @lizvdk: The cool kids use GEOjson so I did too. Here's how I build it with Ruby: ],
"number of followers"=>3590,
"number of friends"=>699,
"latest tweet"=>
"RT @chrisccerami: While learning web development I created a map of all of the shows @Screamales have played and damn @DonGiovanniRecs http…",
"number of tweets"=>1433,
"location"=>"Boston, MA"}},
{"dpickett"=>
{"description"=>"Co-Founder at @LaunchAcademy, Co-Organizer of @bostonrb",
"last twenty tweets"=>
["RT @MeetingBoy: If your employees worked until 3AM, you have failed as a manager.",
"Glad to see two organizations that are near and dear to me (@EntrepreneurOrg and @YEC) at the top of this list: ,
"@lizvdk I had the same reaction - it was like they spent the last 45 minutes trolling the movie industry.",
"RIP @jamesgolick - I learned so much from you, and always thought you were one of the most professional and skilled devs I've ever met :-(",
"Aspiring devs, if you need an example of a professional that embodies all we try to teach and more, look to @hchood Thank you! I'll miss you",
"Some notes for my facilitation tomorrow on debugging JavaScript: ,
"@marcomorawec and @kenmazaika great having you guys at Mission Control! Love meeting folks with their hearts in technical education :-)",
"RT @graysky: \"Resumes suck. Here’s the data.\" by @alinelernerLLC Most create similar, unhelpful resume",
"@paulanthonywils @searls @markbates I reported the @bostonrb imitator as spam. Seems like the right thing to do",
"@divineanimal @LaunchAcademy we're delighted to have you! :-) See you soon and keep us posted on how prelearning is going.",
"sad to hear about @ezmobius passing. His work at @engineyard and some of his conference talks blew my mind. A source of wisdom for many. RIP",
"Thank you! ,
"@jboursiquot happy birthday man!",
"lol! the irony of this error message!,
"such refreshing honesty \"If you really believe that you and your business are one, business failure destroys you\,
"RT @bostonrb: Instead of our monthly meeting, we're going to party in December! Join us at the Black Rose on 12/9 @ 7PM. RSVP @ https://t.c…",
"@dan_kleiman @LaunchAcademy @heroiceric Mr. G is shedding a tear right now.",
"@kdaigle I always consider there to be a 2 or 3 year lag in enterprise adoption of ideas like that.",
"Change is good. \"Why Google doesn’t care about hiring top college graduates\" by @MaxNisen",
"This is why I can't read TechCrunch. What an uninformed piece, and a total misunderstanding of the term \"full stack\],
"number of followers"=>1604,
"number of friends"=>874,
"latest tweet"=>
"RT @MeetingBoy: If your employees worked until 3AM, you have failed as a manager.",
"number of tweets"=>3451,
"location"=>"ÜT: 42.132759,-71.132183"}},
我得到了如何为哈希数组调出一个指定的信息，我正在努力的是立即从所有哈希中获取。我如何能够一次打印每个用户及其描述？ 例子
LaunchAcademy: A 10 week, intensive bootcamp teaching you how to code with a
focus on Ruby on Rails
dpickett: Co-Founder at @LaunchAcademy, Co-Organizer of @bostonrb
答案 0 :(得分：0)
twitter_data.each do |data|
puts "#{data.keys[0]}: #{data[data.keys[0]]['description']}"
end
答案 1 :(得分：0)
首先让我们从一个更合理的数据集开始。
twitter_data = [
{ "LaunchAcademy"=>{ "description"=>"A 10 week, intensive bootcamp",
"last 2 tweets"=>["Hi ho", "Vote for a nasty person!"],
"number of friends"=>1 } },
{ "dpickett"=> { "description"=>"Co-Founder, Co-Organizer",
"last 2 tweets"=> ["How now, brown cow?", "Little Miss Muffet.."],
"number of friends"=>874 } }
]
当我们看到我们所拥有的内容时，很容易看到如何将描述打印到控制台。
twitter_data.each do |h|
k,v = h.first
puts "Description for #{k}: #{v["description"] }"
end
# Description for LaunchAcademy: A 10 week, intensive bootcamp
# Description for dpickett: Co-Founder, Co-Organizer
步骤如下。第一个元素传递给块，块变量h设置为等于该元素：
h = twitter_data.first
#=> {"LaunchAcademy"=>{"description"=>"A 10 week, intensive bootcamp",
# "last 2 tweets"=>["Hi ho", "Vote for a nasty person!"],
# "number of friends"=>1}}
然后提取第一个（也是唯一的）键值对，并使用 parallel assignement 分别为块变量k和`v分配键和值（有时称为< em>多次分配）：
k,v = h.first
#=> ["LaunchAcademy",
# {"description"=>"A 10 week, intensive bootcamp",
# "last 2 tweets"=>["Hi ho", "Vote for a nasty person!"],
# "number of friends"=>1}]
k #=> "LaunchAcademy"
v #=> {"description"=>"A 10 week, intensive bootcamp",
# "last 2 tweets"=>["Hi ho", "Vote for a nasty person!"],
# "number of friends"=>1}
因此，puts'ed的字符串是
"Description for #{k}: #{v["description"]}"
#=> "Description for LaunchAcademy: A 10 week, intensive bootcamp"
twitter_data的第二个元素遵循相同的步骤。