Stefano Pirra pste

🎯

Focusing

Degree in Computer Science in Turin. I love to put everything (web-apps, dbs apps...once also a RD client) in a Docker and run it in a cluster

pste / handlebars-template.html

Last active June 12, 2017 08:11

Handlebars template

	<!DOCTYPE html>
	<html>
	<meta charset="UTF-8">
	<head>
	<script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.10/handlebars.min.js" crossorigin="anonymous"></script>
	</head>
	<body>
	<div id="main">
	<script type="text/x-handlebars-template">

pste / multi-column-sort.js

Created June 12, 2017 08:10

	var items = [{name:"a", age:22}, { name:"b", age:11}, {name:"a", age: 10}]
	var sortingfields = {name:true, age:true} // This is used as a dictionary. Sort by "name" DESC and "age" ASC

	// do the items sort
	items.sort((a,b) => {
	for (col in sortingfields) { // added properties are positional
	if (a[col] != b[col]) { // if they are equal, sorting is made on the next column
	if (sortingfields[col] === true) return a[col] > b[col] // if ASC === true
	else return a[col] < b[col]
	}

pste / file_post.html

Created July 14, 2017 12:57

	<!DOCTYPE html>
	<html>
	<meta charset="UTF-8">
	<head>
	<script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>
	</head>
	<body>
	<button id="uploadbtn">Click me to upload a file ...</button>
	<form id="uploadform" action="sendfile" method="post" enctype="multipart/form-data" style="display:none">
	<input id="uploadfile" type="file" name="file1" >

pste / fileReadAndZip.cs

Created August 23, 2017 15:02

Read a file and zip its content in RAM

	FileInfo fi = new FileInfo(fullpath);
	String b64ZippedData = String.Empty;
	using (FileStream filestream = fi.OpenRead()) // source
	{
	using (MemoryStream memorystream = new MemoryStream()) // destination
	{
	using (GZipStream gzipstream = new GZipStream(memorystream, CompressionMode.Compress, false)) // compression engine
	{
	filestream.CopyTo(gzipstream);
	}

pste / node_working_dom_v1.js

Created August 31, 2017 13:39

Node.js DOM parsing with promises

	var request = require('request');
	var jsdom = require('jsdom');
	var promise = require('promise');
	var colors = require('colors');
	var util = require('util');

	function get(url) {
	return new Promise(function (resolve, reject) {
	console.log('>>>'.yellow, 'started', 'get'.cyan, '[', url.yellow, ']');

pste / select_latest_version.sql

Last active September 7, 2017 15:08

Comparison between "the most recent record" approaches

pste / filesniff.js

Last active April 13, 2018 12:50

sniffing list-of-files info (node.js)

var allstats = filelist.map(filename => ({name: filename, path: path.parse(filename), stats: fs.statSync(filename) }));

pste / pg-sequence.sql

Created September 6, 2019 08:03

Playing with PostgreSQL's sequences

	-- lets play with sequences:
	create table items (id serial primary key, name varchar(10));
	insert into items(name) values ('foo');
	-- manually insert into a serial is allowed BUT it breaks the sequence!
	insert into items(id,name) values (2,'foo');
	-- now what do you expect?
	select currval(pg_get_serial_sequence('items', 'id')); -- ouch! nextval is 1!!
	-- ok, let's fix it up!
	SELECT setval(pg_get_serial_sequence('items', 'id'), (select max(id)+1 from public.items));

pste / vue-expand-datatable.vue

Created September 6, 2019 08:04

Vuetify 1.5.x expandable datatable (by an external button)

	<v-btn @click="explodeAll">{{exploded}}</v-btn>

	<v-data-table
	:headers="headers"
	:items="items"
	item-key="name"
	ref="itemsTable"
	expand
	>
	(..)