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How to run a single RSpec test?

... Usually I do: rspec ./spec/controllers/groups_controller_spec.rb:42 Where 42 represents the line of the test I want to run. EDIT1: You could also use tags. See here. EDIT 2: Try: bundle exec rspec ./spec/controllers/gro...
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RESTful Authentication

...ZGRpbjpvcGVuIHNlc2FtZQ== It's easy to implement, available by default on all browsers, but has some known drawbacks, like the awful authentication window displayed on the Browser, which will persist (there is no LogOut-like feature here), some server-side additional CPU consumption, and the fact t...
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How do I use NSTimer?

...ewController double timerInterval = 1.0f; - (NSTimer *) timer { if (!_timer) { _timer = [NSTimer timerWithTimeInterval:timerInterval target:self selector:@selector(onTick:) userInfo:nil repeats:YES]; } return _timer; } - (void)viewDidLoad { [super viewDidLoad]; [[NSRu...
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Pandas aggregate count distinct

... How about either of: >>> df date duration user_id 0 2013-04-01 30 0001 1 2013-04-01 15 0001 2 2013-04-01 20 0002 3 2013-04-02 15 0002 4 2013-04-02 30 0002 >>> df.groupby("date").agg({"duration": np.sum, "use...
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SQL injection that gets around mysql_real_escape_string()

...ly to SELECT passwd FROM users. In the latter case, the second query is usually executed by use of a UNION clause. – Jacco May 21 '12 at 9:47 59 ...
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SignalR - Sending a message to a specific user using (IUserIdProvider) *NEW 2.0.0*

...ar chat = $.connection.chatHub; // Create a function that the hub can call to broadcast messages. chat.client.addChatMessage = function (who, message) { // Html encode display name and message. var encodedName = $('<div />').text(who).html(); var encodedMsg = $(...
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CSS transition shorthand with multiple properties?

...n: height 0.3s ease-out, opacity 0.3s ease 0.5s; Or just transition them all: -webkit-transition: all 0.3s ease-out; -moz-transition: all 0.3s ease-out; -o-transition: all 0.3s ease-out; transition: all 0.3s ease-out; Here is a straightforward example. Here is another one with the delay propert...
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Merge (with squash) all changes from another branch as a single commit

In Git, is there a way to merge all changes from one branch into another, but squash to a single commit at the same time? ...
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How to get a list of column names on Sqlite3 database?

... PRAGMA table_info(table_name); will get you a list of all the column names. share | improve this answer | follow | ...
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How can I validate a string to only allow alphanumeric characters in it?

How can I validate a string using Regular Expressions to only allow alphanumeric characters in it? 10 Answers ...