conn.exec("INSERT INTO test_define VALUES(1,'Scott Tiger', SYSDATE, SYSTIMESTAMP)") # Define to fetch Date and Time cursor = conn.parse("SELECT name,birthdate,lastvisit FROM test_define WHERE id = :id") cursor.bind_param(1, 1) cursor.define(1, String, 100) cursor.define(2, Date...
cygwin Win32: Remove win32 directory if empty Dec 27, 2024 defs Add zjit.mk Apr 18, 2025 doc Fix tiny typo in syntax/exceptions.rdoc Apr 24, 2025 enc Suppress gcc 15 unterminated-string-initialization warnings Apr 30, 2025 ext [ruby/json] Remove explicit include of extconf.h Apr 30, ...
Use spaces around operators, after commas, colons and semicolons. Whitespace might be (mostly) irrelevant to the Ruby interpreter, but its proper use is the key to writing easily readable code. # badsum=1+2a,b=1,2classFooError<StandardError;end# goodsum=1+2a,b=1,2classFooError<Standard...
array_name = Array.new(size = 0, obj = nil) Parameters Arguments play a very important role in this method. This method will take two arguments, the first one is the size and the second one is the element. If you don't provide any arguments, it will result in an empty Array with ...
array_instance.shift -> object or nil or array_instance.shift(n)-> new_array Parameters This method takes one argument which decides the length of the Array instance which is returned by the method. Example 1 =beginRuby program to demonstrate shift method=end# array declarationtable=[2,4,6...
name+. If the +exec_name+# is not given, an exception will be raised, otherwise the# specified executable's path is returned. +requirements+ allows# you to specify specific gem versions.defself.bin_path(name,exec_name=nil,*requirements)requirements=Gem::Requirement.defaultifrequirements.empty?
默认为nil$O__ectARGF缩写$IO$defout缩写$_String$defoutIO$deferrIO$-FString$stderrIO$stdinIO$stdoutIO环境相关名称类型解释$0String当前执行应用程序名$*Array保存了命令行执行的参数$”Array$$Fixnum$Pro__ss::status$:Array$-aO__ect$-dO__ect$DEBUGO__ect__FILE__String$FArray$FILENAMEString$...
一、Ruby 对象 Ruby 中所有的数据结构和值都是对象,包括基本的数字和字符串以及数组 Array、散列表 Hash 这样的复杂数据结构。...Ruby 的动态特性之一 Ruby 对象可以拦截位置的消息并使他们拥有具体的含义,Rails 框架中大量使用了拦截,发送位置的消息到对象并拦截该消息,然后能够在使用当前数据库表的列名作为动态条件...
6. Write a Ruby program to remove duplicate elements from a given array. Sample Output: Original array: [1, 2, 3, 4, 1, 2, 2, 3, 5, 6] Array with unique elements: [1, 2, 3, 4, 5, 6] Click me to see the solution...
def platform(name, target = nil) if name == :ios and target $target = target.to_s end origin_method(name,target) end end 4、给已存在的类增加方法,可以直接和class一样处理 class Hello def hello(param) puts param end end class Hello ...