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How do DATETIME values work in SQLite?

I’m creating Android apps and need to save date/time of the creation record. The SQLite docs say, however, "SQLite does not have a storage class set aside for storing dates and/or times" and it's "capable of storing dates and times as TEXT, REAL, or INTEGER values". ...
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How to tell if a string is not defined in a Bash shell script

...Autoconf, you'll find that they do not recommend combining terms with '-a' and do recommend using separate simple tests combined with &&. I've not encountered a system where there is a problem; that doesn't mean they didn't used to exist (but they are probably extremely rare these days, eve...
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What is the difference between Ruby 1.8 and Ruby 1.9

...m not clear on the differences between the "current" version of Ruby (1.8) and the "new" version (1.9). Is there an "easy" or a "simple" explanation of the differences and why it is so different? ...
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Analyze audio using Fast Fourier Transform

...you need to calculate the square root of the sum of the square of its real and imaginary components. That is, if your coefficient is a + b*j, then its magnitude is sqrt(a^2 + b^2). Once you have calculated the magnitude of each FFT coefficient, you need to figure out which audio frequency each FFT ...
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What is the javascript filename naming convention? [closed]

...e.js where the product-name + plugin pair can also represent a namespace and a module. The version and filetype are usually optional. filetype can be something relative to how the content of the file is. Often seen are: min for minified files custom for custom built or modified files Examples...
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How can I debug git/git-shell related problems?

... How and where to set this variables? – Hunsu Jan 15 '16 at 8:28 ...
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NULL values inside NOT IN clause

...t I thought were identical queries one using a not in where constraint and the other a left join . The table in the not in constraint had one null value (bad data) which caused that query to return a count of 0 records. I sort of understand why but I could use some help fully grasping the con...
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ETag vs Header Expires

...d around but haven't been able to figure out if I should use both an ETag and an Expires Header or one or the other. 8 ...
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How do I iterate through each element in an n-dimensional matrix in MATLAB?

... answered Apr 17 '09 at 2:46 AndrewAndrew 1,15777 silver badges55 bronze badges ...
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Reduce left and right margins in matplotlib plot

... If you have multiple subplots and want to save each of them, you can use this with fig.savefig() too. (plt.savefig() will not work in that case.) – Abhranil Das Apr 21 '13 at 12:07 ...