Question

Ruby回溯跟踪消息：

["/home/ec2-user/LogglyRails/RailsApp/app/controllers/pages_controller.rb:19:in `sampleRailsNullPointerException'", 
"/home/ec2-user/.rvm/gems/ruby-2.1.2/gems/actionpack-4.1.5/lib/action_controller/metal/implicit_render.rb:4:in `send_action'"]

注意：ruby back trace消息没有换行符。

预期比赛：

/home/ec2-user/LogglyRails/RailsApp/app/controllers/pages_controller.rb
19
sampleRailsNullPointerException

/home/ec2-user/.rvm/gems/ruby-2.1.2/gems/actionpack-4.1.5/lib/action_controller/metal/implicit_render.rb
4
send_action

我试图设计正则表达式：

^(?P<path>[^:]*):(?P<line>\d+):in\s+`(?P<exception>\w+)$

但这个正则表达式与要求不符。

Answer 1

re = /^(?<path>[^:]*):(?<line>\d+):in\s+`(?<exception>\w+)'$/

trace = [
  "/home/ec2-user/LogglyRails/RailsApp/app/controllers/pages_controller.rb:19:in `sampleRailsNullPointerException'", 
  "/home/ec2-user/.rvm/gems/ruby-2.1.2/gems/actionpack-4.1.5/lib/action_controller/metal/implicit_render.rb:4:in `send_action'"
]

trace.map { |line| re.match(line).captures }
# => [["/home/ec2-user/LogglyRails/RailsApp/app/controllers/pages_controller.rb", "19", "sampleRailsNullPointerException"], ["/home/ec2-user/.rvm/gems/ruby-2.1.2/gems/actionpack-4.1.5/lib/action_controller/metal/implicit_render.rb", "4", "send_action"]]

你在行结束前忘记了结束语;另外，我不知道你对(?P...)的意思。

Answer 2

试试这个：

s = "/home/ec2-user/LogglyRails/RailsApp/app/controllers/pages_controller.rb:19:in `sampleRailsNullPointerException'"
m = s.match(/^([^:]+?):(\d+):in\s+`(\w+)'$/)
m[1] #=> "/home/ec2-user/LogglyRails/RailsApp/app/controllers/pages_controller.rb"
m[2] #=> "19"
m[3] #=> "sampleRailsNullPointerException"

Answer 3

如果<PropertyGroup> <Property1>Example</Property1> </PropertyGroup> <Target Name="$(Property1)">是你的数组，你可以写：

arr

使用正则表达式

3 个答案: