My 1billion row challenge solutions in various languages
treybastian.com
1#!/bin/sh
2#
3# Copyright 2023 The original authors
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9# http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16#
17
18exec sed '
19#
20# Transform calculate_average*.sh output into semicolon-separated values, one per line.
21#
22
23# 1. remove "{" and "}"
24s/[{}]//g;
25
26# 2. replace "=" and "/" with semicolon
27s/[=/]/;/g;
28
29# 3. id may contain comma, e.g. "Washington, D.C.;-15.1;14.8;44.8, Wau;-2.1;27.4;53.4"
30# so replace ", " with a newline only if it is preceded by a digit
31s/\([0-9]\), /\1\n/g
32'