在Ruby 中使用IF-Else編寫單行語句 這是一個常規的if-else,如果條件為真,則指定一個動作,如果條件為假,則指定另一個動作。 defcheck_even(number)response=ifnumber.even?then"Yeah, it's even"else"No, it's not"endputs responseendcheck_even(4)check_even(5) ...
条件语句:if ,then ,else ,elsif ,case ,when ,unless 循环语句:for ,in ,while ,until ,next,break ,do ,redo ,retry ,yield 逻辑判断:not ,and ,or 逻辑值和空值:true ,false ,nil 异常处理:rescue ,ensure 对象引用:super ,self 块的起始:begin/end 嵌入模块:BEGIN,END 文件相关:FILE,LINE 方法返...
when/^\s*#/ # If input looks like a comment...next#skip to the next line.when /^quit$/i#If input is "quit" (case insensitive)...break#exit the loop.else#Otherwise...puts line.reverse#reverse the user's input and print it.end end A when clause can have more than one expressio...
Each line should contain at most one statement.(每行应该至少包含一个表达式) foo = 1 ## Correct bar = 2 ## Correct foo = 1; bar = 2 ## AVOID! Compound Statements(复合表达式) if-end, if-else-end, if-elsif-else-end Statements(if-end, if-else-end, if-elsif-else-end表达式) simple...
print works with no line breaks. printf formats numbers like3.14,andstrings like me. Reading from the Console(接受控制台输入) Use "gets" 1 2 3 puts"What is your name?" $name=STDIN.gets puts"Hi "+$name Functions(函数) Our first Ruby function最开始的函数 ...
With these annotations, the LSP test will check if "find all references" onBarinimport Barstatement returns theBar.newusage. Note that animportassertion is dissimilar to adefassertion, in that it is in fact a subclass of ausageassertion. In this case, thedefcorresponding to animportis the ...
Blockchain Lite- Build your own blockchains with crypto hashes; revolutionize the world with blockchains, blockchains, blockchains one block at a time. Ciri- Ruby implementation of Ethereum. MoneyTree Database Tools connection_pool- Generic connection pooling for Ruby, that can be used with ...
"if statement" # (译注:条件语句) elsif false "else if, optional" # (译注:可选的 else if 语句) else "else, also optional" # (译注:同样也是可选的 else 语句) end for counter in 1..5 puts "iteration #{counter}" end #=> iteration 1 ...
Pattern matching in Ruby is done through acasestatement. However, instead of using the usualwhen, the keywordinis used instead. It also supports the use ofiforunlessstatements: case[variableorexpression]in[pattern] ...in[pattern]if[expression] ...else...end ...
Using the insecure key for one container only Using your own key Thetool Inspecting the status of your web app Logs Switching to Phusion Passenger Enterprise Building the image yourself FAQ Why are you using RVM? Why not rbenv or chruby?