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What are the use cases for selecting CHAR over VARCHAR in SQL?
.... It won't have to find out how long the data is in the row and then walk down the string to find the end. All that takes time.
Now bear in mind this can easily be poorly implemented. I have seen char used for primary key fields in online systems. The width must be kept small i.e. char(15) or s...
Amazon S3 CORS (Cross-Origin Resource Sharing) and Firefox cross-domain font loading
...logs/aws/enhanced-cloudfront-customization/ and this answer for more info: https://stackoverflow.com/a/25305915/308315
OK, I finally got the fonts working using the config below with a little tweak from examples in the documentation.
My fonts are hosted on S3, but fronted by cloudfront.
I'm not...
Can Python test the membership of multiple values in a list?
... generators to sets can sometimes be incredibly wasteful, slowing programs down by many orders of magnitude.
Here are a few benchmarks for illustration. The biggest difference comes when both container and items are relatively small. In that case, the subset approach is about an order of magnitude ...
Explain the encapsulated anonymous function syntax
...s and expressions, see this article by kangax.
– Tim Down
Oct 27 '09 at 23:41
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Why is Github asking for username/password when following the instructions on screen and pushing a n
...
Don't use HTTP use SSH instead
change
https://github.com/WEMP/project-slideshow.git
to
git@github.com:WEMP/project-slideshow.git
you can do it in .git/config file
share
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What resources are shared between threads?
...; threads
are the entities scheduled for execution on the CPU.
Further down he provides the following table:
Per process items | Per thread items
------------------------------|-----------------
Address space | Program counter
Global variables | Register...
Circle drawing with SVG's arc path
...e best solution. Still need to handle the 100% case, but just by "rounding down" to 99.999% rather than with a whole separate code branch.
– SimonR
Apr 18 '16 at 14:03
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Is there a standard sign function (signum, sgn) in C/C++?
...u missed the C++ tag. This answer is very much valid and doesn't deserve a down-vote. Moreover, I wouldn't use copysign for integral x even if I had it available.
– avakar
Dec 15 '09 at 8:39
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What is the difference between require_relative and require in Ruby?
... some cases if you are already 'deep' within a directory tree then "up and down" another directory tree branch may be necessary. More simply perhaps, don't use require_relative for files outside of this repository (assuming you are using git which is largely a de-facto standard at this point, late ...
Is MD5 still good enough to uniquely identify files?
...em is their business. Also consider that Bruce Schneier recommends writing down your password; not everything needs to be stored at Fort Knox. Some things will keep just fine under the flower pot.
– Marcelo Cantos
Oct 27 '10 at 11:02
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