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Combined display of all available logs of Helpful. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).
- 16:53, 20 January 2024 Helpful talk contribs created page Sqlite3 (Redirected page to Some databases, sorted by those types#SQLite notes) Tag: New redirect
- 16:31, 20 January 2024 Helpful talk contribs created page Oom-killer (Redirected page to Virtual memory#oom kill) Tag: New redirect
- 16:31, 20 January 2024 Helpful talk contribs created page Oom-kill (Redirected page to Virtual memory#oom kill) Tag: New redirect
- 16:31, 20 January 2024 Helpful talk contribs created page Userspace (Created page with "Userspace / user space means 'done as a regular program'. It is contrasted with kernel space We tend to use this term when it may also be reasonable to do the thing in the kernel 'space' refers more to to memory space, e.g. where things are ''stored'', but it is often implied things are also ''computed'' in the same place (as the kernel, versus as a user). Programs are mostly userspace, while e.g. syscalls go into kernel space (almost the definition of a sysca...")
- 16:30, 20 January 2024 Helpful talk contribs deleted page Bs4 (content was: "#redirect Webpage_scraping_notes#BeautifulSoup", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page Beautifulsoup (content was: "#redirect Webpage_scraping_notes#BeautifulSoup", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page Selenium notes (content was: "#REDIRECT Webpage scraping notes", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page Legal data notes (content was: "#REDIRECT Legal and government data notes", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page ECLI (content was: "#redirect Legal_and_government_data_notes#glossary_e", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page ZBO (content was: "#redirect Legal and government data notes#glossary_z", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page Eur-lex (content was: "#redirect Legal_and_government_data_notes#EUR-Lex", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page Jci (content was: "#redirect Legal_and_government_data_notes#Juriconnect/jci", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page Juriconnect (content was: "#redirect Legal_and_government_data_notes#Juriconnect/jci", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page BWB (content was: "#redirect Legal_and_government_data_notes#glossary_b", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page Intitule (content was: "#redirect Legal_and_government_data_notes#glossary_i", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page LJN (content was: "#redirect Legal_and_government_data_notes#glossary_l", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page HUDOC (content was: "#redirect Legal_and_government_data_notes#HUDOC", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page Eurlex (content was: "#redirect Legal_and_government_data_notes#EUR-Lex", and the only contributor was "Helpful" (talk))
- 16:30, 20 January 2024 Helpful talk contribs deleted page Eur lex (content was: "#redirect Legal_and_government_data_notes#EUR-Lex", and the only contributor was "Helpful" (talk))
- 16:19, 20 January 2024 Helpful talk contribs created page Some databases, sorted by those types (Created page with "{{Database related}} ==File databases== Not a model but a practicality: File databases are useful to persist and store moderately structured data on disk, : often storing many items in one (or a few files) : usually accessible via a single, simple library - meaning they are also considered an embedded database There is typically also some way to alter that data in terms of its items (rather than, as in serialization, the whole thing at once), which ''may'' be li...")
- 16:19, 20 January 2024 Helpful talk contribs created page Data consistency and versioning, and its concepts (Created page with "{{Database related}} ====ACID==== {{stub}} ACID (Atomic, Consistent, Isolated, Durable) is a set of properties you want to guarantee that the data it shows you is correct and consistent and up to date ''at all times''. 'ACID compliant' an be intuited as 'a guarantee that my data is safe and correct'. For a large part, that is about how a sequence of interactions is handled, in particular : dealing with sequences of statements that must be applied all together, or n...")
- 16:18, 20 January 2024 Helpful talk contribs created page Database model types (Created page with "{{Database related}} ===Block store=== Block stores are access a ''large'' series of bytes, in moderately-sized blocks at a time. It's the most 'do everything yourself' variant of storage. There are almost no use cases where users or services want a block device directly. Yes, in theory some specific servers might be more efficient doing their own management of their very specific specific data structures on disk - but many of those choose to use large files the sam...")
- 16:17, 20 January 2024 Helpful talk contribs created page Broad qualifiers, a.k.a. thinking about what you want from your database (Created page with "{{Database related}} ===OLTP, OLAP=== tl;dr: * OLTP basically means systems with ''immediacy'', OLAP often means bulk/batch processing * Systems can be made to do both to some degree, but OLTP often comes with people wanting it to be as immediate as possible * RDBMSes are mostly used for OLTP, NoSQL has less opinion about how it's used You'll see these two as qualifiers, as kinds of setups, and sometimes as specializations of specific kinds of systems/databases....")
- 16:59, 18 January 2024 Helpful talk contribs created page Degit (Redirected page to Git notes#degit) Tag: New redirect
- 16:54, 16 January 2024 Helpful talk contribs created page CSPRNG (Redirected page to Randomness#CSPRNG) Tag: New redirect
- 16:53, 16 January 2024 Helpful talk contribs created page PRNG (Redirected page to Randomness#PRNG) Tag: New redirect
- 13:16, 16 January 2024 Helpful talk contribs created page Replay attack (Redirected page to Security notes / some flaw/exploit notes#Replay attacks) Tag: New redirect
- 21:10, 15 January 2024 Helpful talk contribs created page TCP handshake (Redirected page to Networking notes - Layer 3 (IP mostly)#TCP handhake) Tag: New redirect
- 21:10, 15 January 2024 Helpful talk contribs created page Three-way handshake (Redirected page to Networking notes - Layer 3 (IP mostly)#TCP handhake) Tag: New redirect
- 21:08, 15 January 2024 Helpful talk contribs created page Syn flood (Redirected page to Networking notes - Layer 3 (IP mostly)#TCP: Possible SYN flooding on port 80. Sending cookies) Tag: New redirect
- 16:46, 15 January 2024 Helpful talk contribs created page Linear serpentine (Redirected page to Magnetic media notes#Linear serpentine) Tag: New redirect
- 13:26, 15 January 2024 Helpful talk contribs created page Epoll (Redirected page to File polling, event notification, and asynchronous IO#epoll) Tag: New redirect
- 01:55, 14 January 2024 Helpful talk contribs created page Link preview bots (Created page with "<!-- Some SEO analysis on social sites noticed that adding a nice image to to a link often makes it more likely to be clicked. So now we're previewing ''everything''. Aside from maybe missing some of the original point (link previews were larger and harder to miss than bare links, but if they're all the same, they just clutter up the place) it also means every social site will request every page that someone links to, for metadata and possibly for images on it. Or,...")
- 15:31, 11 January 2024 Helpful talk contribs moved page Security notes / some attack notes to Security notes / some flaw/exploit notes
- 17:16, 10 January 2024 Helpful talk contribs created page Zigbee (Redirected page to Electronics notes/Various wireless notes#ZigBee specific notes) Tag: New redirect
- 17:16, 10 January 2024 Helpful talk contribs created page Home automation / smartness (Created page with " ==Home Assistant== ==Communication== <!-- Things are generally Wifi, Bluetooth, or Zigbee. '''WiFi''' is moderate range : a little more initial setup : you likely have WiFi anyway : phones speak it, but it's not guaranteed to work directly :: ...so this tends to still be a cloudy thing : protocol often proprietary '''Bluetooth''', is more private, but is regularly a little more finicky, also because it is often shorter range than WiFi. : phones speak it, but ne...")
- 23:00, 9 January 2024 Helpful talk contribs created page Dmesg (Created page with "<!-- dmesg is a fixed-size ringbuffer in linux kernel memory. printk() writes to dmesg Boot code writes a bunch to it. Later writes come from things like segfaults, oom-killer, device changes, Ringbuffer means that once full, it rewrites old lines. That fixed '''size''' is usually on the order of dozens to hundreds of kilobytes. If grep CONFIG_LOG_BUF_SHIFT /boot/config-`uname -r` says something like CONFIG_LOG_BUF_SHIFT=18 that means 256KiB (1<<18)...")
- 01:17, 9 January 2024 Helpful talk contribs created page WS2812c (Redirected page to Electronics notes/Diodes#LED pixel strings) Tag: New redirect
- 18:56, 8 January 2024 Helpful talk contribs created page XPath (Redirected page to XML notes#XPath notes) Tag: New redirect
- 18:55, 8 January 2024 Helpful talk contribs created page Xpath (Redirected page to XML notes#XPath notes) Tag: New redirect
- 13:35, 8 January 2024 Helpful talk contribs created page Schematron (Redirected page to XML notes#Related - XSLT, XPath, XQuery, XSL-FO, XSL, etc.) Tag: New redirect
- 00:10, 8 January 2024 Helpful talk contribs created page Glow in the dark (Redirected page to Luminescence) Tag: New redirect
- 23:40, 7 January 2024 Helpful talk contribs created page Push messages (Created page with "<!-- '''Push messages''' are mainly contrasted with polling. tl;dr: * Where polling is an interested party checking an intereting thing with regularity, push messages is an interesting party asking the interesting side to send them a message * while push and pull suggest direction, it's primarily about the initator Polling usually refers to regularly checking in whether anything has changed or happened. When you poll more than a few things, the overhead alone...")
- 13:55, 7 January 2024 Helpful talk contribs created page Push notification (Redirected page to Push messages) Tag: New redirect
- 19:01, 6 January 2024 Helpful talk contribs created page Screen scraping (Created page with "{{scraping}}")
- 17:05, 6 January 2024 Helpful talk contribs created page A/B testing (Created page with "<!-- A/B testing test two variants (A and B), usually showing just one to members of a population (often with a 50-50 split). It usually amounts to statistical hypothesis testing - vary one thing in what you show to people, and who complains less, clicks away less, etc. The setup and analysis can get complex - try to improve engagement metrics ''while'' trying to not affect use experience metrics, vary many different things, etc. ...but each test is usually fairly s...")
- 16:04, 6 January 2024 Helpful talk contribs created page Compound verb (Redirected page to Syntactic and lexical categories#Compound verb) Tag: New redirect
- 15:48, 6 January 2024 Helpful talk contribs changed visibility of 79 revisions on page Syntactic and lexical categories: content hidden, edit summary hidden and username hidden
- 14:38, 6 January 2024 Helpful talk contribs created page Popcorn noise (Redirected page to Stray signals and noise#Impulse noise, burst noise) Tag: New redirect
- 18:32, 5 January 2024 Helpful talk contribs created page Syscall (Created page with "<!-- A syscall refers to when a program asks not a library it's running, or another process, but asks the system itself. This usually refers to * services that only really the OS/kernel should be providing (new processes, scheduling processes). * ...or to ones that aren't ''only'' its domain, but that it still ''does'' provide, like a lot of disk and filesystem related stuff. In theory, there isn't a lot that you couldn't do yourself, without the kernel, but it...")