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Haskell: Lists, Arrays, Vectors, Sequences
...stant , aka purely functional, which is very nice. Haskell lists aren't really "lists" because they are coinductive (other languages call these streams) so things like
ones :: [Integer]
ones = 1:ones
twos = map (+1) ones
tenTwos = take 10 twos
work wonderfully. Infinite data structures rock.
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Gson ignoring map entries with value=null
How do I get it to include all entries?
1 Answer
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What effect(s) can the virtual keyword have in Entity Framework 4.1 POCO Code First?
...effect when used on the properties in EF Code First?. Can someone describe all of its ramifications in different situations?
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How can I perform a str_replace in JavaScript, replacing text in JavaScript?
...erf, you can have different levels of efficiency for creating a regex, but all of them are significantly slower than a simple string replace. The regex is slower because:
Fixed-string matches don't have backtracking, compilation steps, ranges, character classes, or a host of other features that ...
ExecuteReader requires an open and available Connection. The connection's current state is Connectin
...n the Connection-Pool's territory
There's a good reason why ADO.NET internally manages the underlying Connections to the DBMS in the ADO-NET Connection-Pool:
In practice, most applications use only one or a few different
configurations for connections. This means that during application
exe...
How to do a simple file search in cmd
...y occurrence of the specified file name within the
specified directory and all subdirectories.
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How do I create a constant in Python?
.... This is the closest equivalent to Java's final. However, it does not actually prevent reassignment:
from typing import Final
a: Final = 1
# Executes fine, but mypy will report an error if you run mypy on this:
a = 2
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How to set up a git project to use an external repo submodule?
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You have a project -- call it MyWebApp that already has a github repo
You want to use the jquery repository in your project
You want to pull the jquery repo into your project as a submodule.
Submodules are really, really easy to reference and use...
List tables in a PostgreSQL schema
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In all schemas:
=> \dt *.*
In a particular schema:
=> \dt public.*
It is possible to use regular expressions with some restrictions
\dt (public|s).(s|t)
List of relations
Schema | Name | Type | Owner
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Should I use Java date and time classes or go with a 3rd party library like Joda Time?
I'm creating a web based system which will be used in countries from all over the world. One type of data which must be stored is dates and times.
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