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Design patterns to avoid [closed]
...es come naturally in practice as you need to follow them to some degree in order to create isolated and repeatable unit tests.
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count(*) vs count(column-name) - which is more correct? [duplicate]
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COUNT(*) counts all rows
COUNT(column) counts non-NULLs only
COUNT(1) is the same as COUNT(*) because 1 is a non-null expressions
Your use of COUNT(*) or COUNT(column) should be based on the desired output only.
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Can someone give an example of cosine similarity, in a very simple, graphical way?
...similar these texts are, purely in terms of word counts (and ignoring word order). We begin by making a list of the words from both texts:
me Julie loves Linda than more likes Jane
Now we count the number of times each of these words appears in each text:
me 2 2
Jane 0 1
Julie 1 ...
DatabaseError: current transaction is aborted, commands ignored until end of transaction block?
... I'm getting this error when doing syncdb - I think it's to do with the order django goes through the tables.
– Stuart Axon
May 9 '12 at 15:41
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How to trigger a phone call when clicking a link in a web page on mobile phone
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Basic HTTP authentication with Node and Express 4
...he bare minimum you need: (you don't even need to parse the credentials at all)
function (req, res) {
//btoa('yourlogin:yourpassword') -> "eW91cmxvZ2luOnlvdXJwYXNzd29yZA=="
//btoa('otherlogin:otherpassword') -> "b3RoZXJsb2dpbjpvdGhlcnBhc3N3b3Jk"
// Verify credentials
if ( req.headers.a...
Read only the first line of a file?
...nch Python - for instance, I have seen code that worked at my normal shell by assuming UTF-8 later explode when run through Apache with mod_wsgi).
– Mark Amery
Oct 23 '16 at 22:49
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How does std::move() transfer values into RValues?
...alue (and implicit conversion from lvalue to rvalue reference is forbidden by standard).
Here's what happens when we call move with lvalue:
Object a; // a is lvalue
Object b = std::move(a);
and corresponding move instantiation:
// move with [T = Object&]
remove_reference<Object&>...
What are the downsides to using Dependency Injection? [closed]
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A couple of points:
DI increases complexity, usually by increasing the number of classes since responsibilities are separated more, which is not always beneficial
Your code will be (somewhat) coupled to the dependency injection framework you use (or more generally how you ...
Method has the same erasure as another method in type
...n't ready to make any updates, so you leave your Overrider class alone. In order to correctly override the toList() method, the language designers decided that a raw type was "override-equivalent" to any generified type. This means that although your method signature is no longer formally equal to m...