May 12, 2017 [C++, Tech] Series: Iterator, Iterator Wrapper, Non-1-1 Wrapper If you want to wrap an iterable range with another that transforms the underlying iterators in some way and allows looping or constructing other objects: for (auto ch : Upper("abcdef")) { // Prints "ABCDEF" std::cout << ch;…

My talk from ACCU Conference 2017 where I describe a tiny programming language I wrote: Slides: How to write a programming language Cell source code: github.com/andybalaam/cell PakarPBN A Private Blog Network (PBN) is a collection of websites that are controlled by a single individual or organization and used…

May 17, 2017 [C++, Tech] Series: Iterator, Iterator Wrapper, Non-1-1 Wrapper Sometimes we want to write an iterator that consumes items from some underlying iterator but produces its own items slower than the items it consumes, like this: ColonSep items("aa:foo::x"); // Prints "aa, foo, , x" for(auto s…

May 31, 2017 [Performance, Programming Languages, Python, Tech] Series: asyncio basics, large numbers in parallel, parallel HTTP requests, adding to stdlib Update: see the Python Async Basics video on this topic. Python 3’s asyncio module and the async and await keywords combine to allow us to do cooperative…

May 31, 2017 [Performance, Programming, Python, Tech] Series: asyncio basics, large numbers in parallel, parallel HTTP requests, adding to stdlib I am interested in running large numbers of tasks in parallel, so I need something like asyncio.as_completed, but taking an iterable instead of a list, and with a…

June 09, 2017 [Programming, Python, Tech] By default, when you make a UTC date from a Unix timestamp in Python and print it in ISO format, it has no time zone: $ python3 >>> from datetime import datetime >>> datetime.utcfromtimestamp(1496998804).isoformat() '2017-06-09T09:00:04' Whenever you talk about a datetime, I…

June 12, 2017 [Performance, Programming, Python, Tech] Series: asyncio basics, large numbers in parallel, parallel HTTP requests, adding to stdlib Update: slides of a talk I gave at the London Python Meetup on this: Talk slides: Making 100 million HTTP requests with Python aiohttp. Update: see how Cristian…

For when git status is not enough, I wrote git what: If you often have a few branches on the go, it could be useful. PakarPBN A Private Blog Network (PBN) is a collection of websites that are controlled by a single individual or organization and used primarily…

June 27, 2017 [Performance, Programming, Programming Languages, Python] Series: asyncio basics, large numbers in parallel, parallel HTTP requests, adding to stdlib In the previous post I demonstrated how the limited_as_completed method allows us to run a very large number of tasks using concurrency, but limiting the number of…

June 27, 2017 [Programming, Python, Tech] For my attempt to improve the asyncio.as_completed Python standard library function I needed to build a local copy of cpython (the Python interpreter). To test it, I needed the aiohttp module, which is not part of the standard library, so the easiest…