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Database sharding vs partitioning
... use the alphabet to divide the data. A-D is instance 1, E-G is instance 2 etc. Customer data is well suited for this, but will be somewhat misrepresented in size across instances if the partitioning does not take in to account that some letters are more common than others.
Another common technique...
What's the difference between RSpec and Cucumber? [closed]
...ur model is supposed to do, the controller does what it is supposed to do, etc).
RSpec and Cucumber both are used for Acceptance Testing (Which is called ATDD, BDD, Specification by Example, etc depending on who you ask). These are business-case driven Integration Tests, which mean they simulate th...
How is Docker different from a virtual machine?
...s it manage to provide a full filesystem, isolated networking environment, etc. without being as heavy?
19 Answers
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lexers vs parsers
...d/matched parentheses (()()(()())), nested HTML/BBcode tags, nested blocks etc. It's because state automata to deal with it should have to have infinitely many states to handle infinitely many nesting levels.
Level 2: Context-free grammars
They can have nested, recursive, self-similar branches in t...
Using a Single Row configuration table in SQL Server database. Bad idea?
...ormation, Shipping account IDs, PayPal API keys, notification preferences, etc.
12 Answers
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Difference between /res and /assets directories
...ng alternatives for different languages, OS versions, screen orientations, etc., as described here. None of that is available with assets. Also, many parts of the API support the use of resource identifiers. Finally, the names of the resources are turned into constant field names that are checked at...
How to make vim paste from (and copy to) system's clipboard?
...ple what is one doing with "*p? Do I press Shift-', then Shift-8, then p, etc.?
– T. Brian Jones
Nov 7 '13 at 2:09
12
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What's “tools:context” in Android layout files?
...ng (which at runtime happens in the other direction; an activity can call setContentView(layout) to display a layout) in order to drive certain features.
Right now, we're using it for one thing only: Picking the right theme to show for a layout (since the manifest file can register themes to use fo...
How do I use a file grep comparison inside a bash if/else statement?
... was not given, the exit status is 2.
if grep --quiet MYSQL_ROLE=master /etc/aws/hosts.conf; then
echo exists
else
echo not found
fi
You may want to use a more specific regex, such as ^MYSQL_ROLE=master$, to avoid that string in comments, names that merely start with "master", etc.
This wor...
Is there a MySQL command to convert a string to lowercase?
... name value:
function ColBuilder ($field_name) {
…
While ($result = DB_fetch_array($PricesResult)) {
$result[$field_name]
}
…
}
my query being:
SELECT LOWER(itemID), … etc..
needed to be changed to:
SELECT LOWER(itemID) as itemID, … etc..
...