| let cache = new Map(); | |
| let pending = new Map(); | |
| function fetchTextSync(url) { | |
| if (cache.has(url)) { | |
| return cache.get(url); | |
| } | |
| if (pending.has(url)) { | |
| throw pending.get(url); | |
| } |
This is a story about how I tried to use Go for scripting. In this story, I’ll discuss the need for a Go script, how we would expect it to behave and the possible implementations; During the discussion I’ll deep dive to scripts, shells, and shebangs. Finally, we’ll discuss solutions that will make Go scripts work.
While python and bash are popular scripting languages, C, C++ and Java are not used for scripts at all, and some languages are somewhere in between.
You may want a linter plugin to lint your code in Vim but you probably don't need it. At least try the built-in way before jumping on the plugin bandwagon.
autocmd FileType <filetype> setlocal makeprg=<external command>
This autocommand tells Vim to use <external command> when invoking :make % in a <filetype> buffer. You can add as many similar lines as needed for other languages.
| " MIT License | |
| " Copyright (c) 2017 romain Lafourcade | |
| " Permission is hereby granted, free of charge, to any person obtaining a copy | |
| " of this software and associated documentation files (the "Software"), to deal | |
| " in the Software without restriction, including without limitation the rights | |
| " to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| " copies of the Software, and to permit persons to whom the Software is | |
| " furnished to do so, subject to the following conditions: |
Many users when are given server access, do not have root (or sudo) privileges and can not simply do
sudo apt-get install python-pip .
Here's an easy way you can install and use pip without root (or sudo) access in a local directory.
Note : This works without easy_install too.
https://gist.github.com/ljharb/58faf1cfcb4e6808f74aae4ef7944cff
While attempting to explain JavaScript's reduce method on arrays, conceptually, I came up with the following - hopefully it's helpful; happy to tweak it if anyone has suggestions.
JavaScript Arrays have lots of built in methods on their prototype. Some of them mutate - ie, they change the underlying array in-place. Luckily, most of them do not - they instead return an entirely distinct array. Since arrays are conceptually a contiguous list of items, it helps code clarity and maintainability a lot to be able to operate on them in a "functional" way. (I'll also insist on referring to an array as a "list" - although in some languages, List is a native data type, in JS and this post, I'm referring to the concept. Everywhere I use the word "list" you can assume I'm talking about a JS Array) This means, to perform a single operation on the list as a whole ("atomically"), and to return a new list - thus making it mu
| //Example 1 - Calculate average value of an array (transform array into a single number) | |
| var scores = [89, 76, 47, 95] | |
| var initialValue = 0 | |
| var reducer = function (accumulator, item) { | |
| return accumulator + item | |
| } | |
| var total = scores.reduce(reducer, initialValue) | |
| var average = total / scores.length | |
| /*Explain about function |
| function asyncThread(fn, ...args) { | |
| if (!window.Worker) throw Promise.reject( | |
| new ReferenceError(`WebWorkers aren't available.`) | |
| ); | |
| const fnWorker = ` | |
| self.onmessage = function(message) { | |
| (${fn.toString()}) | |
| .apply(null, message.data) | |
| .then(result => self.postMessage(result)); |
