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How to get a key in a JavaScript object by its value?
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How to implement the activity stream in a social network
...on - so pushing an activity out to 1000 friends takes milliseconds.
For a more detailed explanation of what I am talking about, see Redis' Twitter example: http://redis.io/topics/twitter-clone
Update February 2011 I've got 50 million active activities at the moment and I haven't changed anything. ...
Avoiding SQL injection without parameters
...ndustry standard library there is" - can you recommend one for .NET? Maybe more than one depending on the DB: SQLServer, MySQL, PostgreSQL? I've looked for SQL-sanitizer but without much luck, so hsve been forced to implement my own, as best I can (which is no doubt far from foolproof).
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Add one row to pandas DataFrame
...l overwrite existing rows, or insert rows, or create gaps in your index. A more robust (but not fool-proof) approach for appending an existing nonzero-length dataframe would be: df.loc[df.index.max() + 1] = [randint(... or prepopulating the index as @FooBar suggested.
– hobs
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Regular Expressions and negating a whole character group [duplicate]
...ther technique, described here as a tempered greedy token, is suitable for more complex problems, like matching delimited text where the delimiters consist of multiple characters (like HTML, as Luke commented below). For the problem described in the question, it's overkill.
For anyone who's intere...
return statement vs exit() in main()
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Actually, there is a difference, but it's subtle. It has more implications for C++, but the differences are important.
When I call return in main(), destructors will be called for my locally scoped objects. If I call exit(), no destructor will be called for my locally scoped objec...
What is DOCTYPE?
...gered, than you will if it is rendered in standards mode.
Wikipedia has a more in-depth summary of the differences in rendering when using various DOCTYPEs. XHTML is enabled by certain DOCTYPEs, and there is quite a bit of debate about the use of XHTML which is covered well in XHTML — myths a...
Can I create links with 'target=“_blank”' in Markdown?
...om spoofed and fake login UI created by "lookalike" web pages. It might be more possible now where it was more difficult in the past.
– 1.21 gigawatts
Jul 27 '17 at 23:22
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How can I take more control in ASP.NET?
...ues will appear in the URL upon submission so your GET request URL will be more "meaningful"
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="JonSkeetForm.aspx.cs" Inherits="JonSkeetForm" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml...
Detect the Enter key in a text input field
...cause you used .is() and needed === rather than ==. See my answer for some more details.
– wesbos
Aug 15 '11 at 0:48
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