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When to use a key/value store such as Redis instead/along side of a SQL database?
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I did a quick Google search with that tutorial site URL and came across this as a top hit - slideshare.net/dvirsky/introduction-to-redis-version-2
– Paul
Nov 19 '13 at 15:19
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GROUP_CONCAT comma separator - MySQL
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Query to achieve your requirment
SELECT id,GROUP_CONCAT(text SEPARATOR ' ') AS text FROM table_name group by id;
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In pure functional languages, is there an algorithm to get the inverse function?
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In some cases, yes! There's a beautiful paper called Bidirectionalization for Free! which discusses a few cases -- when your function is sufficiently polymorphic -- where it is possible, completely automatically to derive an inverse function. (It also discusses what makes the pr...
Convert string to title case with JavaScript
...hink it is a good solution. Think of ruby open classes, it is perfectly valid to add functions to existing classes and it is widely accepted.
– marco-fiset
Sep 21 '12 at 15:31
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Uri to default sound notification?
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Settings comes from import android.provider.Settings;
– Chris Knight
Oct 10 '13 at 22:16
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Flask SQLAlchemy query, specify column names
...answered Aug 21 '12 at 12:29
David McKeoneDavid McKeone
2,49511 gold badge1212 silver badges88 bronze badges
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What is the meaning of “$” sign in JavaScript
...re's nothing mysterious about the use of $ in JavaScript. $ is simply a valid JavaScript identifier.
JavaScript allows upper and lower letters, numbers, and $ and _. The $ was intended to be used for machine-generated variables (such as $0001).
Prototype, jQuery, and most javascript libraries use ...
How can I check if an element exists in the visible DOM?
...w do you test an element for existence without the use of the getElementById method?
25 Answers
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How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
...ion statement just by putting ".to_sql" at the end. This question also provides that answer: stackoverflow.com/questions/3814738/…
– Steve Midgley
Sep 17 '14 at 5:03
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Is is possible to check if an object is already attached to a data context in Entity Framework?
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Here's what I ended up with, which works very nicely:
public static void AttachToOrGet<T>(this ObjectContext context, string entitySetName, ref T entity)
where T : IEntityWithKey
{
ObjectStateEntry entry;
// Track whether we need to perform an attach
bool attach = false;
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