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What are the main uses of yield(), and how does it differ from join() and interrupt()?
...le to assume all those tasks are indeed complete. (Not to be confused with SQL Joins!)
interruption: Used by one thread to 'poke' another thread which is sleeping, or waiting, or joining - so that it is scheduled to continue running again, perhaps with an indication it has been interrupted. (Not to ...
What's wrong with using $_REQUEST[]?
...mations are often performed in the application code instead of declared in SQL: some programmers suck.
As such, if one tends to use $_REQUEST everywhere, I can do anything via GET that I could via POST, which means setting up <img> tags on my (malicious) site that cause users logged into your...
How to decide when to use Node.js?
...looking at Javascript, I'm working in the Client, C# means the App Server, SQL = database. Working in Javascript throughout, I've found myself confusing the layers, or simply taking longer to context-switch. This is likely an artifact of working on the .NET stack all day and Noding at night, but it ...
Is there ever a time where using a database 1:1 relationship makes sense?
...nd even with such support one has to be careful to exclude the columns (in SQL explicit column lists are normal, but some ORMs want to drag the entire record). The trick is to know your use pattern: if most of the time the actual data is ignored I would use a 1:1 blob table. If most accesses are dow...
How to create a memory leak in Java?
...'s a bad practice not to close, but it doesn't cause a leak. Unclosed java.sql.Connection is the same.
– bestsss
Jul 17 '11 at 18:38
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What is the difference between the Data Mapper, Table Data Gateway (Gateway), Data Access Object (DA
...underlying datastore, the emphasis in TableDataGateway is encapsulation of SQL operations over a single table (not necessarily in a datastore neutral/portable fashion).
– Pierce Hickey
May 10 '13 at 17:31
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MongoDB with redis
... results. A company well-known for running MongoDB and Redis (along with MySQL and Sphinx) is Craiglist. See this presentation from Jeremy Zawodny.
MongoDB is interesting for persistent, document oriented, data indexed in various ways. Redis is more interesting for volatile data, or latency sensiti...
Common programming mistakes for Clojure developers to avoid [closed]
...boolean java-bool) "Yes" "No").
I got burned by this with clojure.contrib.sql library that returns database boolean fields as java Boolean objects.
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Why do we need boxing and unboxing in C#?
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true - it shows up all the time in ADO.NET too - sql parameter values are all 'object's no matter what the real data type is
– Ray
Jan 21 '10 at 19:12
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MongoDB: Combine data from multiple collections into one..how?
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Doing unions in MongoDB in a 'SQL UNION' fashion is possible using aggregations along with lookups, in a single query. Here is an example I have tested that works with MongoDB 4.0:
// Create employees data for testing the union.
db.getCollection('employe...