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Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?

...ibrary C drags along Library H, Library E, Library J, Library M, Library K and Library N. This makes it harder to reuse each library independently from the rest - for example in unit testing. However, in a loosely coupled application, by moving all the references to the Composition Root, the depend...
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How is __eq__ handled in Python and in what order?

....x sees a == b, it tries the following. If type(b) is a new-style class, and type(b) is a subclass of type(a), and type(b) has overridden __eq__, then the result is b.__eq__(a). If type(a) has overridden __eq__ (that is, type(a).__eq__ isn't object.__eq__), then the result is a.__eq__(b). If type(...
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Heroku Postgres - terminate hung query (idle in transaction)

I'm using Heroku with the Crane Postgres option and I was running a query on the database from my local machine when my local machine crashed. If I run ...
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Is it a good idea to index datetime field in mysql?

...n/5.0/en/mysql-indexes.html This makes your datetime column an excellent candidate for an index if you are going to be using it in conditions frequently in queries. If your only condition is BETWEEN NOW() AND DATE_ADD(NOW(), INTERVAL 30 DAY) and you have no other index in the condition, MySQL will...
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How can I change the version of npm using nvm?

...S for my node work. It works totally fine for installing separate versions and switching between them. It also installs the latest version of NPM within each local .../bin folder along with the node binary. However, there doesn't seem to be any way to switch the version of NPM that I'm using (or at ...
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How can I parse a string with a comma thousand separator to a number?

I have 2,299.00 as a string and I am trying to parse it to a number. I tried using parseFloat , which results in 2. I guess the comma is the problem, but how would I solve this issue the right way? Just remove the comma? ...
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Sort Dictionary by keys

...ry. However, 'Dictionary' is also a 'CollectionType' of (key, value) pairs and we can use the global 'sorted' function to get a sorted array containg both keys and values, like this: let sortedKeysAndValues = sorted(dictionary) { $0.0 < $1.0 } println(sortedKeysAndValues) // [(A, [1, 2]), (D, [5...
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Object.getOwnPropertyNames vs Object.keys

What's the difference between Object.getOwnPropertyNames and Object.keys in javascript? Also some examples would be appreciated. ...
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Are static class instances unique to a request or a server in ASP.NET?

...asses unique to each web request, or are they instantiated whenever needed and GCed whenever the GC decides to disposed of them? ...
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val() vs. text() for textarea

I am using jQuery, and wondering if I should use val() or text() (or another method) to read and update the content of a textarea. ...