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What is a “Bitmap heap scan” in a query plan?
...ference is that, rather than visiting every disk page, a bitmap index scan ANDs and ORs applicable indexes together, and only visits the disk pages that it needs to.
This is different from an index scan, where the index is visited row by row in order -- meaning a disk page may get visited multiple ...
How to properly handle a gzipped page when using curl?
I wrote a bash script that gets output from a website using curl and does a bunch of string manipulation on the html output. The problem is when I run it against a site that is returning its output gzipped. Going to the site in a browser works fine.
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How to delete the last n commits on Github and locally?
...itory. You can remove it with git push -f
– Ivan Fernandez
Jan 14 '13 at 11:33
Can you generalize this for last n numb...
Does MySQL included with MAMP not include a config file?
...t it more "nicely," though it's a bit of a pain for people used to the command line. Just go File->Edit Template->MySQL my.cnf, and change whatever settings you need. More info on both MAMP and MAMP pro here.
– Chris Krycho
Apr 6 '12 at 18:46
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Compare dates in MySQL
...e that is between 2 given dates.
The column from the database is DATETIME, and I want to compare it only to the date format, not the datetime format.
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Finding the PHP File (at run time) where a Class was Defined
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if you had an includes folder, you could run a shell script command to "grep" for "class $className" by doing: $filename = ``grep -r "class $className" $includesFolder/*\ and it would return which file it was in. Other than that, i don't think there is any magic function for PHP to do it ...
Sort Dictionary by keys
...ry. However, 'Dictionary' is also a 'CollectionType' of (key, value) pairs and we can use the global 'sorted' function to get a sorted array containg both keys and values, like this:
let sortedKeysAndValues = sorted(dictionary) { $0.0 < $1.0 }
println(sortedKeysAndValues) // [(A, [1, 2]), (D, [5...
Difference between Python's Generators and Iterators
What is the difference between iterators and generators? Some examples for when you would use each case would be helpful.
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Proper package naming for testing with the Go language
I have seen several different test package naming strategies within Go and wanted to know what pros and cons of each are and which one I should use.
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Using SSH keys inside docker container
...at executes various fun stuff with Git (like running git clone & git push) and I'm trying to docker-ize it.
30 Answers
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