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What does passport.session() middleware do?
...hub.com/jaredhanson/passport/blob/master/lib/strategies/session.js
Specifically lines 59-60:
var property = req._passport.instance._userProperty || 'user';
req[property] = user;
Where it essentially acts as a middleware and alters the value of the 'user' property in the req object to contain the...
Hide options in a select list using jQuery
...
You cannot do this x-browser. If I recall ie has issues. The easiest thing to do is keep a cloned copy of the select before you remove items, this allows you to easily remove and then append the missing items back.
...
Random string generation with upper case letters and digits
...ndom.choices(string.ascii_uppercase + string.digits, k=N))
A cryptographically more secure version; see https://stackoverflow.com/a/23728630/2213647:
''.join(random.SystemRandom().choice(string.ascii_uppercase + string.digits) for _ in range(N))
In details, with a clean function for further reu...
What is a stored procedure?
...step against SQL injection.
Stored procedures do come with downsides, basically the maintenance associated with your basic CRUD operation. Let's say for each table you have an Insert, Update, Delete and at least one select based on the primary key, that means each table will have 4 procedures. Now ...
Where can I get a list of Ansible pre-defined variables?
...r that particular host.
Here is the output for my vagrant virtual machine called scdev:
scdev | success >> {
"ansible_facts": {
"ansible_all_ipv4_addresses": [ ...
.NET JIT potential error?
...edi
00000012 push esi
00000013 mov ecx,ebx
00000015 call dword ptr ds:[00170210h] ; first unrolled call
0000001b push edi ; WRONG! does not increment oVec.y
0000001c push esi
0000001d mov ecx,ebx
0000001f c...
Passing a function with parameters as a parameter?
...unction wrapper that knows about the parameter and passes it to the actual callback implementation.
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Why is SELECT * considered harmful?
...er. Imagine a query that joins two tables, both of which contain a column called "ID". How would a consumer know which was which? SELECT * can also confuse views (at least in some versions SQL Server) when underlying table structures change -- the view is not rebuilt, and the data which comes bac...
Why is using the rails default_scope often recommend against?
... default_scope { where(published: true) }
belongs_to :user
end
Calling user.destroy will delete all the posts that are published, but it won't delete posts that are unpublished. Hence the database will throw a foreign key violation because it contains records that reference the user you ...
How do Mockito matchers work?
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Mockito matchers are static methods and calls to those methods, which stand in for arguments during calls to when and verify.
Hamcrest matchers (archived version) (or Hamcrest-style matchers) are stateless, general-purpose object instances that implement Matcher<...