在Ruby中,可以使用gsub方法在String(字符串)中进行条件替换。 gsub方法是Ruby中String类的一个方法,用于全局替换字符串中的匹配项。它接受两个参数:第一个参数是要替换的模式(可以是字符串或正则表达式),第二个参数是替换后的内容。 使用gsub方法进行条件替换的基本语法如下: 代码语言:ruby 复制 string.gsub(patte...
# to replace substrings in a string # by using the assignment like '[]=' irb>>str The world for a Ferrari Irb>> str[10..22] # The range can also be specified using [x1..x2] for a Ferrari irb>> str[" Ferrari"]=" horse" # A substring can be specified to be replaced by ...
irb>> str[" Ferrari"]=" horse" # A substring can be specified to be replaced by a new # string. Ruby strings are intelligent enough to adjust the # size of the string to make up for the replacement string. irb>> s The world for a horse irb>> s.split # Split, splits the stri...
string[0,3]# "abc"string[3,3]# "123"string[0..-2]# "abc12"#remove or replace the substringstring[0..2] = ""puts string# "123" 子字符串是字符串的一小部分,如果你只想要那个特定的部分,它会很有用,比如开头、中间或结尾 将字符串转换为小写或大写 1234 "HELLO World".downcase # "...
The next method is where all the action is and it's a doozy, so we will take it in pieces. The first chunk builds and sorts the suffix tree:ruby # ... def longest_repeated_substring(string) size = string.length suffixes = Array.new(size) size.times do |i| suffixes[i] = string...
string = "abc123" string[0,3] # "abc" string[3,3] # "123" string[0..-2] # "abc12" #remove or replace the substring string[0..2] = "" puts string # "123" 子字符串是字符串的一小部分,如果你只想要那个特定的部分,它会很有用,比如开头、中间或结尾 将字符串转换为小写或大写 "...
for Linux tryhttp://www.rpmfind.net. Our first program(从此开始) Enter the following into the file, "test.rb". 1 puts"Howdy!" At the C: prompt enter, 1 C:>ruby test.rb This produces: 1 Howdy! OK, daylight's burning, let's move on. ...
for Linux tryhttp://www.rpmfind.net. Our first program(从此开始) Enter the following into the file, "test.rb". 1 puts"Howdy!" At the C: prompt enter, 1 C:>ruby test.rb This produces: 1 Howdy! OK, daylight's burning, let's move on. ...
string = "abc123" string[0,3] # "abc" string[3,3] # "123" string[0..-2] # "abc12" #remove or replace the substring string[0..2] = "" puts string # "123"子字符串是字符串的一小部分,如果你只想要那个特定的部分,它会很有用,比如开头、中间或结尾...
In addition to looking for characters in a string, you can check to see if a string starts with a character or substring using thestart_with?method: text="Sammy has a balloon"text.start_with?("s")# truetext.start_with?("Sammy has"# true ...