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Approximate cost to access various caches and main memory?
... 1K bytes with Zippy PROCESS
20,000 ns - Send 2K bytes over 1 Gbps NETWORK
250,000 ns - Read 1 MB sequentially from MEMORY
500,000 ns - Round trip within a same DataCenter
10,000,000 ns - DISK seek
10,000,000 ns - Read 1 MB sequentially from NETWORK
30,000,000 ns - ...
What's the difference(s) between .ToList(), .AsEnumerable(), AsQueryable()?
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The Select produces a WhereSelectEnumerableIterator. This is an internal .Net class that implements IEnumerable, not IQueryable. So a conversion to another type has taken place and the subsequent AsQueryable can never return the original source anymore.
The implication of this is that using AsQuery...
How do JavaScript closures work?
...ues makes it more difficult to understand. Here is the true story jsfiddle.net/rjdx34k0/3
– Hugolpz
Sep 2 at 19:13
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Grouping functions (tapply, by, aggregate) and the *apply family
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From slide 21 of http://www.slideshare.net/hadley/plyr-one-data-analytic-strategy:
(Hopefully it's clear that apply corresponds to @Hadley's aaply and aggregate corresponds to @Hadley's ddply etc. Slide 20 of the same slideshare will clarify if you don't get it...
Complete Working Sample of the Gmail Three-Fragment Animation Scenario?
...my animation comprehension, and that I like parenthetical statements)
The net effect is that left slides off the screen, middle slides to the original position and size of left, and right translates in right behind middle.
showLeft() simply reverses the process, with the same mix of animators, jus...
RAII and smart pointers in C++
...'s an error. No memory is left hanging.
For instance, another example is network socket RAII. In this case:
We open network socket before we use it,always, even when we don't feel like -- it's hard to do it another way with RAII. If you try doing this without RAII you might open empty socket for...
List of Big-O for PHP functions
... (as the question states). Not a single benchmark of my examples. svn.php.net/repository/php/php-src/branches/PHP_5_3/ext/…
– Kendall Hopkins
Mar 20 '10 at 15:27
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Tactics for using PHP in a high-load site
...h server loads. Treat me as (sigh) an alien that has just landed on the planet, albeit one that knows PHP and a few optimisation techniques.
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What is the scope of variables in JavaScript?
...ven if that if branch isn't reached it is redefined. An example - jsfiddle.net/3CxVm
– Chris S
Jun 12 '13 at 23:28
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RabbitMQ and relationship between channel and connection
...hing similar to what I programmed my client to do (mine was based off the .Net client, but heavily modified).
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