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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).
...
Difference between float and decimal data type
...
This is what I found when I had this doubt.
mysql> create table numbers (a decimal(10,2), b float);
mysql> insert into numbers values (100, 100);
mysql> select @a := (a/3), @b := (b/3), @a * 3, @b * 3 from numbers \G
*************************** 1. row *************************...
What does principal end of an association means in 1:1 relationship in Entity framework
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@Ladislav, I need to make two independant tables that both have an optional reference to each other (one to one), I want them both to have their own PKs each, how is this possible? I posted a separate question.
– Shimmy Weitzhandler
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Is < faster than
...is "borrowed" bit was usually referred to as the carry bit and would be testable by a branch instruction. A second bit called the zero bit would be set if the subtraction were identically zero which implied equality.
There were usually at least two conditional branch instructions, one to branch on ...
What are the pros and cons of performing calculations in sql vs. in your application
shopkeeper table has following fields:
13 Answers
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How to make join queries using Sequelize on Node.js
...sted, but what it does is basically just aliasing all columns of the users table to make sure they are placed into the correct model when returned and not mixed up with the posts model
Other than that you'll notice that it does a JOIN instead of selecting from two tables, but the result should be t...
The JPA hashCode() / equals() dilemma
...ness of the business id in the database. Why having THREE indexes for each table in the database then?
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