amex to gitness
bel
parent
7b8a76a65d
commit
33ef36fed0
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module 0_setup
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go 1.18
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require github.com/mattn/go-sqlite3 v1.14.15
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github.com/mattn/go-sqlite3 v1.14.15 h1:vfoHhTN1af61xCRSWzFIWzx2YskyMTwHLrExkBOjvxI=
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github.com/mattn/go-sqlite3 v1.14.15/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
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package main
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import (
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"database/sql"
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"flag"
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"fmt"
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"log"
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"strings"
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_ "github.com/mattn/go-sqlite3"
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)
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func main() {
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dbpath := flag.String("db", "./db.db", "path to db file")
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q := flag.String("q", "show tables", "query to execute")
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flag.Parse()
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query := strings.Trim(strings.TrimSpace(*q), ";")
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if len(query) == 0 {
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panic("refusing empty query")
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}
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query += ";"
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log.Printf("%s", query)
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db, err := sql.Open("sqlite3", *dbpath)
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if err != nil {
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panic(err)
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}
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if strings.HasPrefix(strings.ToUpper(strings.TrimSpace(query)), "SELECT") {
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rows, err := db.Query(query)
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if err != nil {
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panic(err)
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}
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defer rows.Close()
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columns, err := rows.Columns()
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if err != nil {
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panic(err)
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}
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ptrs := make([]any, len(columns))
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for i := range ptrs {
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var v interface{}
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ptrs[i] = &v
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}
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for rows.Next() {
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if err := rows.Scan(ptrs...); err != nil {
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panic(err)
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}
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result := make([]string, len(columns))
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for i := range ptrs {
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ptr := ptrs[i].(*interface{})
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result[i] = fmt.Sprintf("%s:%+v", columns[i], *ptr)
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}
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log.Println(result)
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}
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} else {
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stmt, err := db.Prepare(query)
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if err != nil {
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panic(err)
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}
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result, err := stmt.Exec()
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if err != nil {
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panic(err)
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}
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affected, err := result.RowsAffected()
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log.Printf("%d: %v", affected, err)
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}
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}
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#! /bin/bash
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main() {
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set -e
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set -o pipefail
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local bin=./0_setup
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local cmds=(
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'DROP TABLE IF EXISTS a'
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'CREATE TABLE a(
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x INT,
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y VARCHAR(20),
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PRIMARY KEY (x)
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)'
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'DROP TABLE IF EXISTS b'
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'CREATE TABLE b(
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x INT,
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y VARCHAR(20),
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PRIMARY KEY (x)
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)'
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'SELECT * FROM a'
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'INSERT INTO a
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(x, y)
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VALUES
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(4, "a")
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'
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'SELECT * FROM a'
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'SELECT * FROM b'
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'INSERT INTO b
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(x, y)
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VALUES
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(5, "b")
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'
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'SELECT * FROM b'
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'UPDATE b
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SET x=4
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WHERE y="b"
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'
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'SELECT * FROM b'
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'SELECT * FROM a JOIN b WHERE a.x == b.x'
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'SELECT a.y, b.y FROM a JOIN b WHERE a.x == b.x'
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)
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for cmd in "${cmds[@]}"; do
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echo =================
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$bin -q "$cmd"
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echo
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done
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}
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main "$@"
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module 1_
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go 1.18
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module 2_
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go 1.18
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Binary file not shown.
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#! /bin/bash
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main() {
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set -e
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set -o pipefail
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local bin=../0_setup/0_setup
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local cmds=(
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'DROP TABLE IF EXISTS events'
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'
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CREATE TABLE events (
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sensor_id integer not null,
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event_type integer not null
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);
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'
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'INSERT INTO events VALUES (2, 2)'
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'INSERT INTO events VALUES (2, 4)'
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'INSERT INTO events VALUES (2, 2)'
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'INSERT INTO events VALUES (3, 2)'
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'INSERT INTO events VALUES (2, 3)'
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"$@"
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)
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for cmd in "${cmds[@]}"; do
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echo =================
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$bin -q "$cmd"
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echo
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done
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}
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main "$@"
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module 4_
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go 1.18
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task1: ezpz
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task2: that one was like "if you turn on bulbs in order X, Y, Z; then how many seconds are all at+before the current bulb active?" I left a comment explaining "this is probably the google one where you have O(1) space by doing negatives; that'll do". Looks like my performance was bad (as I said in comment n**2). No surprise given it's space efficient. Looks like time complexity is Codility's priority. Surprised I failed 1 of 5 correctness, but that should be fatal.
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task3: I LITERALLY DIDNT SORT YET GOT 100% CORRECT that'd disgusting
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task4: I missed a multi-choice question. Bullshit. They were so fuckin easy and I bothered to double check. I don't trust proctor here.
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