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Add CT3531 Database Systems II

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Aindréas Ó hAodha
2023-12-07 01:44:01 +00:00
parent 7b2a29c42d
commit cf8beab504
95 changed files with 2485 additions and 0 deletions
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third/semester1/CT3532: Database Systems II/assignments/assignment2/latex/_minted-main/204BF28A37A9FE2763EC6154AF77DE11541C68F80C6A6F06151AFD63BAE50EBC.pygtex Normal file
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\begin{Verbatim}[commandchars=\\\{\}]
\PYG{n}{determine\PYGZus{}grid}\PYG{p}{(}\PYG{n}{x}\PYG{p}{,}\PYG{n}{y}\PYG{p}{)}
\end{Verbatim}

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\begin{Verbatim}[commandchars=\\\{\},codes={\catcode`\$=3\catcode`\^=7\catcode`\_=8\relax}]
\PYG{c+c1}{\PYGZsh{} input: a pair of (x,y) co-ordinates}
\PYG{c+c1}{\PYGZsh{} output: a string that identifies the grid}
\PYG{k}{def} \PYG{n+nf}{determine\PYGZus{}grid}\PYG{p}{(}\PYG{n}{x}\PYG{p}{,} \PYG{n}{y}\PYG{p}{):}
\PYG{n}{grid\PYGZus{}width} \PYG{o}{=} \PYG{l+m+mi}{29} \PYG{c+c1}{\PYGZsh{} width of each grid in metres}
\PYG{n}{grid\PYGZus{}height} \PYG{o}{=} \PYG{l+m+mi}{15} \PYG{c+c1}{\PYGZsh{} height of each grid in metres}
\PYG{c+c1}{\PYGZsh{} determining the location of the grid using floor division}
\PYG{n}{grid\PYGZus{}x} \PYG{o}{=} \PYG{n}{x} \PYG{o}{//} \PYG{n}{grid\PYGZus{}width}
\PYG{n}{grid\PYGZus{}y} \PYG{o}{=} \PYG{n}{y} \PYG{o}{//} \PYG{n}{grid\PYGZus{}height}
\PYG{c+c1}{\PYGZsh{} return the grid identifier in the format `x.y`}
\PYG{k}{return} \PYG{n+nb}{str}\PYG{p}{(}\PYG{n}{grid\PYGZus{}x}\PYG{p}{)} \PYG{o}{+} \PYG{l+s+s2}{\PYGZdq{}.\PYGZdq{}} \PYG{o}{+} \PYG{n+nb}{str}\PYG{p}{(}\PYG{n}{grid\PYGZus{}y}\PYG{p}{)}
\end{Verbatim}

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third/semester1/CT3532: Database Systems II/assignments/assignment2/latex/_minted-main/9B622CB86E79F75F50900BD70DBE4EC6541C68F80C6A6F06151AFD63BAE50EBC.pygtex Normal file
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\begin{Verbatim}[commandchars=\\\{\}]
\PYG{n}{determine\PYGZus{}grid}\PYG{p}{(}\PYG{n}{x}\PYG{p}{,} \PYG{n}{y}\PYG{p}{)}
\end{Verbatim}

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\begin{Verbatim}[commandchars=\\\{\}]
\PYG{n}{determine\PYGZus{}grid}\PYG{p}{()}
\end{Verbatim}

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\begin{Verbatim}[commandchars=\\\{\}]
\PYG{c+c1}{\PYGZsh{} function to return the times when two given players are in the same location}
\PYG{c+c1}{\PYGZsh{} input: player ID of both players}
\PYG{c+c1}{\PYGZsh{} output: array of timestamps}
\PYG{k}{def} \PYG{n+nf}{same\PYGZus{}times}\PYG{p}{(}\PYG{n}{player1}\PYG{p}{,} \PYG{n}{player2}\PYG{p}{,} \PYG{n}{grid}\PYG{p}{):}
\PYG{c+c1}{\PYGZsh{} get the times both players are in the given grid}
\PYG{n}{player1\PYGZus{}times} \PYG{o}{=} \PYG{n}{query}\PYG{p}{(}\PYG{l+s+s2}{\PYGZdq{}select times from table @ \PYGZdq{}} \PYG{o}{+} \PYG{n+nb}{hash}\PYG{p}{(}\PYG{n}{player1}\PYG{p}{,} \PYG{n}{grid}\PYG{p}{))}
\PYG{n}{player2\PYGZus{}times} \PYG{o}{=} \PYG{n}{query}\PYG{p}{(}\PYG{l+s+s2}{\PYGZdq{}select times from table @ \PYGZdq{}} \PYG{o}{+} \PYG{n+nb}{hash}\PYG{p}{(}\PYG{n}{player2}\PYG{p}{,} \PYG{n}{grid}\PYG{p}{))}
\PYG{n}{same\PYGZus{}times} \PYG{o}{=} \PYG{p}{[]}
\PYG{c+c1}{\PYGZsh{} index i for player1\PYGZus{}times and index j for player2\PYGZus{}times}
\PYG{n}{i} \PYG{o}{=} \PYG{n}{j} \PYG{o}{=} \PYG{l+m+mi}{0}
\PYG{k}{while} \PYG{n}{i} \PYG{o}{\PYGZlt{}} \PYG{n+nb}{len}\PYG{p}{(}\PYG{n}{player1\PYGZus{}times}\PYG{p}{)} \PYG{o+ow}{and} \PYG{n}{j} \PYG{o}{\PYGZlt{}} \PYG{n+nb}{len}\PYG{p}{(}\PYG{n}{player2\PYGZus{}times}\PYG{p}{):}
\PYG{k}{if} \PYG{n}{player1\PYGZus{}times}\PYG{p}{[}\PYG{n}{i}\PYG{p}{]} \PYG{o}{==} \PYG{n}{player2\PYGZus{}times}\PYG{p}{[}\PYG{n}{j}\PYG{p}{]:}
\PYG{c+c1}{\PYGZsh{} both players are in the grid cell at this time}
\PYG{n}{same\PYGZus{}times}\PYG{o}{.}\PYG{n}{append}\PYG{p}{(}\PYG{n}{player1\PYGZus{}times}\PYG{p}{[}\PYG{n}{i}\PYG{p}{])}
\PYG{n}{i} \PYG{o}{+=} \PYG{l+m+mi}{1}
\PYG{n}{j} \PYG{o}{+=} \PYG{l+m+mi}{1}
\PYG{k}{else} \PYG{k}{if} \PYG{n}{player2\PYGZus{}times}\PYG{p}{[}\PYG{n}{j}\PYG{p}{]} \PYG{o}{\PYGZgt{}} \PYG{n}{player1\PYGZus{}times}\PYG{p}{[}\PYG{n}{i}\PYG{p}{]:}
\PYG{c+c1}{\PYGZsh{} increment the player1 index (i) as it\PYGZsq{}s smaller than the time at j}
\PYG{n}{i} \PYG{o}{+=} \PYG{l+m+mi}{1}
\PYG{k}{else}\PYG{p}{:}
\PYG{c+c1}{\PYGZsh{} increment the player2 index (j) as it\PYGZsq{}s smaller than the time at i}
\PYG{n}{j} \PYG{o}{+=} \PYG{l+m+mi}{1}
\PYG{k}{return} \PYG{n}{same\PYGZus{}times}
\end{Verbatim}

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\begin{Verbatim}[commandchars=\\\{\},codes={\catcode`\$=3\catcode`\^=7\catcode`\_=8\relax}]
\PYG{c+c1}{\PYGZsh{} function to determine the number of times a given player was in a given grid}
\PYG{c+c1}{\PYGZsh{} input: player ID, grid identifier}
\PYG{c+c1}{\PYGZsh{} output: count of the number of times that player ID was recorded in that grid}
\PYG{k}{def} \PYG{n+nf}{player\PYGZus{}grid\PYGZus{}values}\PYG{p}{(}\PYG{n}{player\PYGZus{}id}\PYG{p}{,} \PYG{n}{grid\PYGZus{}id}\PYG{p}{):}
\PYG{c+c1}{\PYGZsh{} get table location on disk}
\PYG{n}{table\PYGZus{}location} \PYG{o}{=} \PYG{n+nb}{hash}\PYG{p}{(}\PYG{n}{player\PYGZus{}id}\PYG{p}{,} \PYG{n}{grid\PYGZus{}id}\PYG{p}{)}
\PYG{c+c1}{\PYGZsh{} query the number of rows in that table using some pseudo-SQL nonsense}
\PYG{n}{count} \PYG{o}{=} \PYG{n}{select}\PYG{p}{(}\PYG{l+s+s2}{\PYGZdq{}count(*) from table @ \PYGZdq{}} \PYG{o}{+} \PYG{n}{table\PYGZus{}location}\PYG{p}{)}
\PYG{k}{return} \PYG{n}{count}
\PYG{c+c1}{\PYGZsh{} function to generate a an array of heatmap values for every location on the pitch}
\PYG{c+c1}{\PYGZsh{} input: an array of locations on the pitch, an array of the player IDs in the game}
\PYG{c+c1}{\PYGZsh{} output: an array numbers indicating the number of times a player was in each location}
\PYG{k}{def} \PYG{n+nf}{generate\PYGZus{}heatmap}\PYG{p}{(}\PYG{n}{locations}\PYG{p}{,} \PYG{n}{players}\PYG{p}{):}
\PYG{c+c1}{\PYGZsh{} output array will hold the number of times a player was in each location, in the same order as the locations array}
\PYG{n}{heatmap\PYGZus{}values} \PYG{o}{=} \PYG{p}{[]} \PYG{c+c1}{\PYGZsh{} assume each index initialises to 0}
\PYG{c+c1}{\PYGZsh{} iterate over each location}
\PYG{k}{for} \PYG{p}{(}\PYG{n+nb}{int} \PYG{n}{i} \PYG{o}{=} \PYG{l+m+mi}{0}\PYG{p}{;} \PYG{n}{i} \PYG{o}{\PYGZlt{}} \PYG{n}{locations}\PYG{o}{.}\PYG{n}{length}\PYG{p}{;} \PYG{n}{i}\PYG{o}{++}\PYG{p}{):}
\PYG{c+c1}{\PYGZsh{} iterate over each player for each location}
\PYG{k}{for} \PYG{p}{(}\PYG{n+nb}{int} \PYG{n}{j} \PYG{o}{=} \PYG{l+m+mi}{0}\PYG{p}{;} \PYG{n}{j} \PYG{o}{\PYGZlt{}} \PYG{n}{players}\PYG{o}{.}\PYG{n}{length}\PYG{p}{;} \PYG{n}{j}\PYG{o}{++}\PYG{p}{):}
\PYG{n}{player\PYGZus{}id} \PYG{o}{=} \PYG{n}{players}\PYG{p}{[}\PYG{n}{j}\PYG{p}{]}
\PYG{n}{heatmap\PYGZus{}values}\PYG{p}{[}\PYG{n}{i}\PYG{p}{]} \PYG{o}{+=} \PYG{n}{player\PYGZus{}grid\PYGZus{}values}\PYG{p}{(}\PYG{n}{player\PYGZus{}id}\PYG{p}{,} \PYG{n}{location}\PYG{p}{)}
\end{Verbatim}

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\makeatletter
\def\PYG@reset{\let\PYG@it=\relax \let\PYG@bf=\relax%
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\def\PYG@tok#1{\csname PYG@tok@#1\endcsname}
\def\PYG@toks#1+{\ifx\relax#1\empty\else%
\PYG@tok{#1}\expandafter\PYG@toks\fi}
\def\PYG@do#1{\PYG@bc{\PYG@tc{\PYG@ul{%
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\def\PYGZus{\char`\_}
\def\PYGZob{\char`\{}
\def\PYGZcb{\char`\}}
\def\PYGZca{\char`\^}
\def\PYGZam{\char`\&}
\def\PYGZlt{\char`\<}
\def\PYGZgt{\char`\>}
\def\PYGZsh{\char`\#}
\def\PYGZpc{\char`\%}
\def\PYGZdl{\char`\$}
\def\PYGZhy{\char`\-}
\def\PYGZsq{\char`\'}
\def\PYGZdq{\char`\"}
\def\PYGZti{\char`\~}
% for compatibility with earlier versions
\def\PYGZat{@}
\def\PYGZlb{[}
\def\PYGZrb{]}
\makeatother