ruby 测试字符串是否以另一个字符串开头或结尾
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Testing whether string starts with or end with another string
提问by MxLDevs
How should I check whether a string starts or ends with a given string? There doesn't seem to be any built-in methods available (or maybe it's just the IDE I'm using that isn't having it show up: RDE)
我应该如何检查字符串是否以给定的字符串开头或结尾？似乎没有任何可用的内置方法（或者可能只是我正在使用的 IDE 没有显示它：RDE）
回答by Will Richardson
There are built in methods:
有内置方法：
"String".start_with? "S" # true
"String".end_with? "4" # false
回答by sqrcompass
string.start_with?("substring")
string.end_with?("substring")
Returns true or false
返回真或假
Source:
来源：
http://ruby-doc.org//core-2.2.0/String.html#method-i-start_with-3F
http://ruby-doc.org//core-2.2.0/String.html#method-i-start_with-3F
http://ruby-doc.org//core-2.2.0/String.html#method-i-end_with-3F
http://ruby-doc.org//core-2.2.0/String.html#method-i-end_with-3F
