Detecting an "invalid date" Date instance in JavaScript
I'd like to tell the difference between valid and invalid date objects in JS, but couldn't figure out how: var d = new Date("foo"); console.log(d.toString()); // shows 'Invalid Date' console.log(typeof d); // shows 'object' console.log(d instanceof Date); // shows 'true' Any ideas for writing an isValidDate function? Ash recommended Date.parse for parsing date strings, which gives an authoritative
Is there a mechanism to loop x times in ES6 (ECMAScript 6) without mutable variables?
The typical way to loop x times in JavaScript is: for (var i = 0; i < x; i++) doStuff(i); But I don't want to use the ++ operator or have any mutable variables at all. So is there a way, in ES6, to loop x times another way? I love Ruby's mechanism: x.times do |i| do_stuff(i) end Anything similar in JavaScript/ES6? I could kind of cheat and make my own generator: function* times(x) { for (var i = 0
Rails 6.1, Ruby 3.0.0: tests error as they cannot load rexml
I've created a new Rails 6.1 application from scratch with Ruby 3.0.0. I've run db:create and generated a single model with some string columns, followed by rails db:migrate. I ran rails test but got this require rexml error: /Users/froop/.rvm/gems/ruby-3.0.0/gems/bootsnap-1.5.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:34:in `require': cannot load such file -- rexml/document (LoadEr
Homebrew: List only installed top level formulas
I'm looking for a way to show only the formulas I installed without the installed dependencies. I want to have a list of all the programs I actually installed, without all noise of the dependencies. I do know about brew list which lists all installed formulas. I also know that brew graph gives me a dependency graph in the graphviz Or in other words: I want to have the minimal set of formulas to re
Why do people group rspec under test and development in the Gemfile?
I'm generally clear on bundler Gemfile options, but I'm not sure why rspec (specifically, rspec-rails) should be in both test and development. Here are my test groupings: group :development, :test do gem 'rspec-rails' gem 'faker' end group :test do gem "factory_girl_rails" gem "capybara" gem 'guard-rspec' gem 'rb-fsevent' gem 'growl' end Does this look ok?
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AWS Security Group for RDS - Outbound rules
What is concrete implementation?
Convert a string to base64 in JavaScript. btoa and atob are deprecated
Why does git produce a merge conflict when lines next to each other are changed?
RSpec partial match against a nested hash
npm equivalent of yarn install --check-files (or yarn check)
Why use Time.current over Time.zone.now in Rails, when Time.zone is always set?
How to generate controller inside namespace in rails
How to use different .env files with nextjs?
Annoying Sound with GitHub Copilot When making in-line suggetions in Visual Studio Code
Auto scaling service in AWS without duplicating cron jobs
Next.js 13 devDependencies?
SSM Secure reference is not supported in: AWS::EC2::Instance/Metadata
AWS CDK - Vague error while creating an AWS ECS service
What is the purpose of app.synth() in AWS CDK?