9.2.2 Greatest hits from previous weeks

9.2.2.1 Why am I getting that $0.999999999999988 \geq 1.0$ is True?
9.2.2.2 Skip header lines on import
9.2.2.3 Is there an open source implementation of Mathematica-the-language?
9.2.2.4 Generate a Unit Circle Trigonometry
9.2.2.5 What does "Tag Integer is Protected" message mean?
9.2.2.6 Calculate the 2D Fourier transform of an Image
9.2.2.7 Figuring when the minute and hour hand coincide on a clock
9.2.2.1 Why am I getting that $0.999999999999988 \geq 1.0$ is True?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=241791

I am getting these results: 
... 
[numerics] [precision-and-accuracy]
 
asked by Craig Carter https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12461 Score of 23
answered by Greg Hurst https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4346 Score of 26
9.2.2.2 Skip header lines on import

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=50718

When importing a data file what are the comment symbols for Mathematica? 
That is, given a file like this 
 
 blabla 
bulbul 
 
1 2 6 54 7 ... 
.. 
 
 
what symbol do I have ... 
[import] [text]
 
asked by MaxJ https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=14687 Score of 21
answered by george2079 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2079 Score of 18
9.2.2.3 Is there an open source implementation of Mathematica-the-language?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=4454

I've seen questions before such as "What is the best open-source equivalent for Mathematica?", but that specific question (and that line of inquiry in general) cares more about the computer algebra ... 
[programming] [open-source]
 
asked by sblom https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=178 Score of 128
answered by Simon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=34 Score of 91
9.2.2.4 Generate a Unit Circle Trigonometry

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=2456

Struggling often with Trigonometry I would like to have some code to generate this Unit Circle Trigonometry. Would be of great help when I need to transform some data : 
[graphics] [trigonometry]
 
asked by 500 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=172 Score of 19
answered by Mark McClure https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36 Score of 33
9.2.2.5 What does "Tag Integer is Protected" message mean?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=6738

(Newbie question) 
 
For every function I define I get this message: 
When I close and reopen Mathematica, and re-enter the function definition, I don't get the message anymore. What does it mean? 
[warning-messages]
 
asked by stevenvh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1450 Score of 15
answered by J. M.'s persistent exhaustion https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=50 Score of 16
9.2.2.6 Calculate the 2D Fourier transform of an Image

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=29203

I am new to Mathematica, and using version 8.0. 
 
I would like to calculate the 2D Fourier Transform of an  Image  with Mathematica and plot the magnitude and phase ... 
[image-processing] [image] [fourier-analysis]
 
asked by user8727 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8727 Score of 20
answered by Nasser https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=70 Score of 37
9.2.2.7 Figuring when the minute and hour hand coincide on a clock

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=573

I would like to list all possible times in a 12-hour period, where the hour hand overlaps the minute hand completely.  This is really a question about three distinct things - to be done in Mathematica ... 
[equation-solving]
 
asked by Steve D https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=191 Score of 16
answered by Verbeia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8 Score of 22