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What is the difference between task and thread?
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A task is something you want done.
A thread is one of the many possible workers which performs that task.
In .NET 4.0 terms, a Task represents an asynchronous operation. Thread(s) are used to complete that operation by breaking the work up into chunks and assigning to separate threads.
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Check if a method exists
...j respondsToSelector:@selector(methodName:withEtc:)]) {
[obj methodName:123 withEtc:456];
}
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How can I ask the Selenium-WebDriver to wait for few seconds in Java?
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123
Well, there are two types of wait: explicit and implicit wait.
The idea of explicit wait is
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How to detect online/offline event cross-browser?
...er vendors update the navigator.onLine flag when actual network access is lost, others don't.
From the spec:
Returns false if the user agent is
definitely offline (disconnected from
the network). Returns true if the user
agent might be online.
The events online and offline are
fired when the value ...
Array versus List: When to use which?
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123
Really just answering to add a link which I'm surprised hasn't been mentioned yet: Eric's Lipp...
Installing Apple's Network Link Conditioner Tool
... Just double-click the Network Link Conditioner.prefpane and OS X will install it for you. (System Preferences will pop up and ask you about it.)
– Kurt Revis
May 11 '12 at 3:52
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Format decimal for percentage values?
...complete example:
using System.Globalization;
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decimal myValue = -0.123m;
NumberFormatInfo percentageFormat = new NumberFormatInfo { PercentPositivePattern = 1, PercentNegativePattern = 1 };
string formattedValue = myValue.ToString("P2", percentageFormat); // "-12.30%" (in en-us)
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What is the difference between SQL, PL-SQL and T-SQL?
...guage to operate on sets.
It is more or less standardized, and used by almost all relational database management systems: SQL Server, Oracle, MySQL, PostgreSQL, DB2, Informix, etc.
PL/SQL is a proprietary procedural language used by Oracle
PL/pgSQL is a procedural language used by PostgreSQL
TSQL i...
Browser detection in JavaScript? [duplicate]
...F 3's issue with not sending the Content-Length header for read-only AJAX POST messages), feature support just doesn't cut it.
– Cobra
Jun 12 '13 at 16:04
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What is the best way to programmatically detect porn images? [closed]
...ones - and porn images tend to have a lot of skin. This will create false positives but if this is a problem you can pass images so detected through actual moderation. This not only greatly reduces the the work for moderators but also gives you lots of free porn. It's win-win.
#!python
import o...