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When & why to use delegates? [duplicate]

I'm relatively new in C#, & I'm wondering when to use Delegates appropriately . they are widely used in events declaration, but when should I use them in my own code and why are they useful? why not to use something else? ...
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What is the exact difference between currentTarget property and target property in javascript

Can anyone please tell me the exact difference between currentTarget and target property in Javascript events with example and which property is used in which scenario? ...
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Using Python 3 in virtualenv

Using virtualenv , I run my projects with the default version of Python (2.7). On one project, I need to use Python 3.4. ...
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Passing functions with arguments to another function in Python?

Is it possible to pass functions with arguments to another function in Python? 7 Answers ...
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Skip certain tables with mysqldump

Is there a way to restrict certain tables from the mysqldump command? 10 Answers 10 ...
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Bundler: Command not found

I am hosting on a vps, ubuntu 10.04, rails 3, ruby and mysql installed correctly by following some tutorials. If I run bundle check or bundle install I get the error '-bash: bundle: command not found'. From gem list --local I see 'bundler (1.0.2, 1.0.0)' is installed. ...
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Get the IP address of the machine

This Question is almost the same as the previously asked Get the IP Address of local computer -Question. However I need to find the IP address(es) of a Linux Machine . ...
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Avoid trailing zeroes in printf()

I keep stumbling on the format specifiers for the printf() family of functions. What I want is to be able to print a double (or float) with a maximum given number of digits after the decimal point. If I use: ...
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Simplest way to detect a mobile device in PHP

What is the simplest way to tell if a user is using a mobile device to browse my site using PHP? 15 Answers ...
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Getting output of system() calls in Ruby

If I call a command using Kernel#system in Ruby, how do I get its output? 15 Answers ...