Magic words:
psql -U postgresSome interesting flags (to see all, use -h or --help depending on your psql version):
-E: will describe the underlaying queries of the \ commands (cool for learning!)-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)My implementation of the Gale/Shapley algorithm in Python. This algorithm is designed to address the Stable Marriage Problem.
Compare this recursive variant with the implementations on Rosetta Code.
Given an equal number of men and women to be paired for marriage, each man ranks all the women in order of his preference and each women ranks all the men in order of her preference.
A stable set of engagements for marriage is one where no man prefers a women over the one he is engaged to, where that other woman also prefers that man over the one she is engaged to. I.e. with consulting marriages, there would be no reason for the engagements between the people to change.
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| #!/bin/bash | |
| LOADING=false | |
| usage() | |
| { | |
| cat << EOF | |
| usage: $0 [options] dbname | |
| OPTIONS: |
| """ | |
| Implementation of pairwise ranking using scikit-learn LinearSVC | |
| Reference: | |
| "Large Margin Rank Boundaries for Ordinal Regression", R. Herbrich, | |
| T. Graepel, K. Obermayer 1999 | |
| "Learning to rank from medical imaging data." Pedregosa, Fabian, et al., | |
| Machine Learning in Medical Imaging 2012. |
