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Proper Linq where clauses
...amp;&
c.CustomerID == 2 &&
c.CustomerID == 3
select c customer table in linqpad
against my Customer table it output the same sql query
-- Region Parameters
DECLARE @p0 Int = 1
DECLARE @p1 Int = 2
DECLARE @p2 Int = 3
-- EndRegion
SELECT [t0].[CustomerID], [t0].[CustomerName]
FROM [Cust...
Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
...strings. Although hash-rockets provide freedom and functionality for hash-tables, specifically allowing strings as keys, application performance may be slower than if the hash-tables were to be constructed with symbols as hash-keys. The following resources may be able to clarify any differences be...
What is the difference between Strategy design pattern and State design pattern?
...that useful. You can always implement finite state machines using a lookup table (it's not an OO way, but it works pretty well).
Strategy is used for the following [GoF book p. 316]:
many related classes differ only in their behavior. Strategies provide a way to configure a class with one of...
How can I add “href” attribute to a link dynamically using JavaScript?
...one you can use without having to setAttribute. Another example is the <table> element (HTMLTableElement) where you can use insertRow() to insert new rows without having to create the <tr> and append it to the table.
– Thai
Jan 14 '11 at 9:00
...
Twitter image encoding challenge [closed]
...First, it generates a very large bignum to represent the data in the block table and the image size. The approach to this is similar to Sam Hocevar's solution -- kind of a large number with a radix that varies by position.
Then it converts that into a base of whatever the size of the character set...
When to call activity context OR application context?
...
I used this table as a guidance for when to use the different types of Context such as Application context (i.e: getApplicationContext()) and activity context , also BroadcastReceiver context:
All merits go to original author here for...
Using arrays or std::vectors in C++, what's the performance gap?
...ong. The standard forbids exponential growth: § 23.2.3 paragraph 16 says "Table 101 lists operations that are provided for some types of sequence containers but not others. An implementation shall provide these operations for all container types shown in the “container” column, and shall implem...
Why can't C++ be parsed with a LR(1) parser?
...terministic parser with an extra hack: they intertwine parsing with symbol table
collection... so that by the time "x" is encountered,
the parser knows if x is a type or not, and can thus
choose between the two potential parses. But a parser
that does this isn't context free, and LR parsers
(the pu...
Running PostgreSQL in memory only
... put the Postgres binaries into SVN (but it's more than just a single executable).
You will need to run initdb to setup your test database before you can do anything with this. This can be done from a batch file or by using Runtime.exec(). But note that initdb is not something that is fast. You wi...
Is there a software-engineering methodology for functional programming? [closed]
... bases of what it takes to build real systems, while maintaining minimal mutable state in a highly controlled fashion. I'm toying with building Pong and Tetris in a FRelP style (excuse the strange initialism, but there is already another more popular FRP: Functional Reactive Programming).
...