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Check if a number is int or float
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@David: issubclass would be an error, as it works on classes. isinstance checks if a given object is an instance of a class or one of that class's subclasses, so it's perfectly generic. Methinks that isinstance(obj, cls) is equivalent to issubclass(obj.__c...
How to find the Git commit that introduced a string in any branch?
...etween S and "string_to_search". In some setups (git 1.7.1), you'll get an error like:
fatal: ambiguous argument 'string_to_search': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions
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Asynchronous method call in Python?
...sted. It introduces the Deferred object, which you can attach callbacks or error handlers ("errbacks") to. A Deferred is basically a "promise" that a function will have a result eventually.
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How to reverse a 'rails generate'
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rails destroy controller Controller_name was returning a bunch of errors. To be able to destroy controller I had to remove related routes in routes.rb. P.S. I'm using rails 3.1
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javax.validation.ValidationException: HV000183: Unable to load 'javax.el.ExpressionFactory'
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If you are using tomcat as your server runtime and you get this error in tests (because tomcat runtime is not available during tests) than it makes make sense to include tomcat el runtime instead of the one from glassfish). This would be:
<dependency>
<groupId>org...
Debugging sqlite database on the device
...l select queries on each table. One worked fine, the other reported a data error in the file. My best guess right now is an encoding mismatch between the Android and local shell.
– Mason
Feb 9 '15 at 18:44
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How to create a new branch from a tag?
...s doesn't work because of "<tag> is not a valid commit" or a similar error (often when working on a shared repository), refer to stackoverflow.com/questions/35979642/…
– SalmonKiller
Nov 9 '18 at 23:04
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Remove element by id
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Does not work. Too many errors. This works : var elem = document.getElementById('id') ; elem.parentNode.removeChild(elem);
– Mitch Match
Jan 22 '16 at 13:01
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How to set input type date's default value to today?
...ack to text inputs in the non-supporting browsers, the other solution will error or fail.
– brianary
Nov 17 '16 at 23:01
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Property getters and setters
...rning:
Attempting to access 'name' from within it's own getter.
The error looks vague like this:
As an alternative you might want to use didSet. With didSet you'll get a hold to the value that is was set before and just got set to. For more see this answer.
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