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What does the exclamation mark do before the function?

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Adding a column to a data.frame

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Where can I learn how to write C code to speed up slow R functions? [closed]

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How does the compilation/linking process work?

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Difference between Key, Primary Key, Unique Key and Index in MySQL

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How can we redirect a Java program console output to multiple files?

How can we redirect the eclipse console output to a file? I can: 5 Answers 5 ...
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How to change the background color of the options menu?

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What is a stream?

What is a stream in the programming world? Why do we need it? 6 Answers 6 ...
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What is the best scripting language to embed in a C# desktop application? [closed]

We are writing a complex rich desktop application and need to offer flexibility in reporting formats so we thought we would just expose our object model to a scripting langauge. Time was when that meant VBA (which is still an option), but the managed code derivative VSTA (I think) seems to have with...
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Why do we use __init__ in Python classes?

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