您可以使用File.new方法创建一个File对象用于读取、写入或者读写,读写权限取决于 mode 参数。最后,您可以使用File.close方法来关闭该文件。 语法 aFile=File.new("filename","mode")#... 处理文件aFile.close File.open方法 您可以使用File.open方法创建一个新的 file 对象,并把该 file 对象赋值给文件。但是...
f1 = File.new("file1", "r+") # Read/write, starting at beginning of file. f2 = File.new("file2", "w+") # Read/write; truncate existing file or create a new one. f3 = File.new("file3", "a+") # Read/write; start at end of existing file or create a # new one. 3、...
File.open("filename","mode")do|aFile|# ... process the fileend 下表列出了打开文件的不同模式: 模式描述 r只读模式。文件指针被放置在文件的开头。这是默认模式。 r+读写模式。文件指针被放置在文件的开头。 w只写模式。如果文件存在,则重写文件。如果文件不存在,则创建一个新文件用于写入。
file.each_line do |line| puts line.chomp # 去除行尾换行符 end end File.foreach:简化逐行读取。 ruby File.foreach("example.txt") do |line| puts line end (2) 写入文件 覆盖写入: ruby File.write("output.txt", "Hello, Ruby!") 追加写入: ruby File.open("output.txt", "a") do |fil...
myfile=File.new("write.txt","w+")# 读写模式打开文件=>#<File:write.txt>myfile.puts("This test line 1")# 写入第一行=>nilmyfile.puts("This test line 2")# 写入第二行=>nilmyfile.rewind# 将指针移动到开头=>0myfile.readline=>"This test line 1\n"myfile.readline=>"This test line...
file.write("hehe\nhahah") #io.stream operationrequire'stringio'ios= StringIO.new("abcdef\n ABC \n 12345") ios.seek(5)#把偏移指针移到5(e字母所在位置)ios.puts("xyz3")#从5开始覆写原有数据puts ios.tell#tell--Returns the current offset (in bytes) of ios.puts ios.string ...
If you want to write to a file using Ruby: Open the file in write mode (“w” flag) Use thewritemethod to add data to the file If you didn’t use the block version, remember toclose Example: File.open("log.txt", "w") { |f| f.write "#{Time.now} - User logged in\n" }...
WebAssembly/WASI support in Ruby intends to leverage those projects. It enables Ruby developers to write applications which run on such promised platforms. Use case This support encourages developers to utilize CRuby in a WebAssembly environment. An example use case is TryRuby playground’s CRuby ...
in a file calledindex.txt. In a production environment, # it will likely be stored in a database. INDEX_TXT = 'index.txt'.freeze def write_index(index) File.open(INDEX_TXT, 'w') { |f| f.write(index.to_s) } end def read_index return File.read(INDEX_TXT).to_i if File....
程序集: DocumentFormat.OpenXml.dll 包: DocumentFormat.OpenXml v2.8.1 拼音指南属性。 此类在 Office 2007 及更高版本中可用。 当对象序列化为 xml 时,其限定名称为 w:rubyPr。 C# 复制 [DocumentFormat.OpenXml.ChildElementInfo(typeof(DocumentFormat.OpenXml.Wordprocessing.RubyAlign))] [Docu...