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C# Regex for Guid
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123}
123)
Regex:
^({)?(\()?\d+(?(1)})(?(2)\))$
The solutions is simplified to match only numbers to show in a more clear way what is required if needed.
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Best way to initialize (empty) array in PHP
...S3 for example), it has been noted that initializing a new array is faster if done like this var foo = [] rather than var foo = new Array() for reasons of object creation and instantiation. I wonder whether there are any equivalences in PHP?
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Citing the author of a blockquote using Markdown syntax
... would like to have the quote followed by a citation beneath it, but right now all it does is blockquote the whole line. How does one do this in markdown syntax?
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OS X: equivalent of Linux's wget
...ng third-party software is not an option, for this has to run on a lot of different systems which I don't have control on).
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Exact difference between CharSequence and String in java [duplicate]
...d to see CharSequence used to define arguments and return types.
Details
Nowadays we know that generally an API/framework should focus on exporting interfaces primarily and concrete classes secondarily. But we did not always know this lesson so well.
The String class came first in Java. Only late...
How can I avoid running ActiveRecord callbacks?
...n :do_something_else
skip_callback :validation, :before, :do_something, if: :skip_some_callbacks
skip_callback :validation, :after, :do_something_else, if: :skip_some_callbacks
end
person = Person.new(person_params)
person.skip_some_callbacks = true
person.save
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MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...态处理
when UrsPahoMqttClient1.ConnectionStateChanged newState
do
if newState = 1 then // 连接成功
set CurrentRetry to 0
set Label_ConnectionStatus.Text to "已连接 - 在线"
set Label_ConnectionStatus.TextColor to Green
call subscribeToAllTopics
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Why is there extra padding at the top of my UITableView with style UITableViewStyleGrouped in iOS7
... Although this "brute force" solution works, I think the bottom ones (specifically the automatically adjust insets) should be ranked higher.
– eladleb
Apr 2 '14 at 13:37
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How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
...id", "subject_type_id"],
:unique => true,
:name => 'my_index'
If using the :index option on references in a create_table block, it takes the same options hash as add_index as its value:
t.references :long_name, index: { name: :my_index }
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How do I set up a simple delegate to communicate between two view controllers?
.../ See http://stackoverflow.com/a/4796131/263871 for the rationale
// (Tip: If you're not using ARC, use `assign` instead of `weak`)
@property (nonatomic, weak) id<ChildViewControllerDelegate> delegate;
// A simple IBAction method that I'll associate with a close button in
// the UI. We'll cal...