...eager_load or includes queries. Thus, as a general guideline.includes or .eager_load with 1-n associations are dangerous. We recommend to mainly use .preload instead. ActiveRecord::Relation#joins
SELECT "users".* FROM "users" SELECT "posts".* FROM "posts" WHERE "posts"."user_id" IN (1) Accessing each user's posts will not produce extra queries. If all you want is...
...the method (and not out of the first block or something similar). def test [1, 2, 3].each do |counter| example { return counter } end return 'test' end test # => 1
...when we look at what was said above about the expected return value): # bad [1, 2, 3].each { |counter| break counter if counter.even? } # => 2 [1, 3].each { |counter| break counter...
...nslookup will be sufficient. host simple DNS lookup utility. >host heise.de heise.de has address 193.99.144.80 heise.de has IPv6 address 2a02:2e0:3fe:1001:302:: heise.de mail is handled by 10...
...domain name servers. Nslookup has two modes: interactive and non-interactive. >nslookup heise.de Server: 146.254.160.30 Address: 146.254.160.30#53 Non-authoritative answer: Name: heise.de Address: 193.99.144.80 Name: heise.de
...been included for download at the end. This card is roughly structured as follows: 1. Research approach 2. Background 3. Implementation 3.1 Usage 3.xx Implementation details 4. Evaluation
...complete project for all modified files. T1 T2 T3 T4 T5 T6 F1 0 10 5 0 2 0 F2 1 6 0 4 0 0 F3 0
...the content type of a file attachment. Normally we would not expect content_type_1 to be a valid content type with the used regular expression image\/(jpeg|png). But...
...as ^ and $ will match lines, it matches both content_type_1 and content_type_2. Using \A and \z will work as expected instead and excludes content_type_1.
To do this, start your rails server using something like DISABLE_SPRING=1 strace -e trace=file -f bin/rails s The -e trace=file hides all non-file...
...calls, for example: Video Load (0.0ms) SELECT "images".* FROM "images" WHERE "image"."id" = $1 LIMIT $2 [["id", 975], ["LIMIT", 1]] [pid 264211] stat("/etc/localtime", {st_mode=S_IFREG...
...callbacks later Typical use cases for async Animations Network calls Delays (show tooltip after 100 ms, then animate) When you wait for I/O most of the time (web servers, crawlers...
...Each then() callback gets the settlement value of the previous callback: promise = Promise.resolve(1) promise = promise.then(x) { // x is now 1 return 2 } promise = promise.then(y) {
In RubyMine you can use find and replace with capture groups (.*?) and backreferences $1 (if you have several groups: $[Capture-Group ID]). Named captures (? .*) are also supported. Examples
...expression captures whatever is contained by two double quotes. Fill in replace field with '$1'. The $1 references what was captured. RubyMine shows you a preview of the result, so...
...hash_including argument matcher with a nested hash: describe 'user' do let(:user) { {id: 1, name: 'Foo', thread: {id: 1, title: 'Bar'} } it do expect(user).to match( hash_including...
...id: 1, thread: {id: 1} ) ) end end The example will fail and returns a not very helpful error message: expected {:id => 1, :name => "Foo", :thread => {:id => 1, :title => "Bar"}} to...
...efficient way to do it. Let's say I need this HTML structure: item 1 item 2 This card compares various approaches to fabricating DOM elements for testing. Constructing individual...
...let list = document.createElement('ul') list.type = 'square' jasmine.fixtures.appendChild(ul) let item1 = document.createElement('li') item1.innerText = 'item 1' list.appendChild(item1) let item2 = document.createElement('li') list.appendChild(item2) For a reader it is hard to...
typeof x === 'string' || x instanceof String // => true Numbers Numbers can exist as literal (123) and as an object (new Number(123)), hence we cannot rely on typeof:
typeof new Number(123) // => "object" Your test should check both forms: x = 123 typeof x === 'number' || x instanceof Number // => true Functions x = function() {} typeof x === 'function' // => true
Define a class and create objects: UserPreview = Struct.new(:gid, :email, :name) u = UserPreview.new(1, 'hans@peter.de', 'Hans Peter') => #<struct UserPreview gid=1, email="hans@peter.de", name="Hans Peter"> access attributes:
u.name => "Hans Peter" u['name'] => "Hans Peter" u[:name] => "Hans Peter" u[2] => "Hans Peter" u.to_a => [1, "hans@peter.de", "Hans Peter"] u.to_h => {:gid=>1, :email=>"hans@peter.de", :name=>"Hans...
...to 4 reduced test failures by 80% while only increasing test runtime by 10%: CPUs Test runtime Test runtime (%) Failures Failures (%) 8 308 100% 14 100% 8 304 99%
6 43% 4 343 111% 1 7% 4 346 112% 6 43% 4 333 108% 2 14% 4 340 110% 3 21% 3 378 123% 2
...do ES6 classes translate to prototypes and vice versa? We will spend the first 10 minutes to cover some JavaScript basics and then dive deep into details. Level 1: Objects...
height: 20, computeArea: function() { return this.width * this.height } } shape.width // => 30 shape.height // => 20 shape.height = 100 Note how "methods" are just properties with a function value: shape.computeArea // => function() { return this.width * this.height...
def splat_kwargs(**kwargs) # ... end def no_kwargs(*args) # ... end explicit_kwargs(x: 1, y: 2) # works explicit_kwargs({x: 1, y: 2}) # raises an ArgumentError explicit_kwargs(**{x...
...1, y: 2}) # works splat_kwargs(x: 1, y: 2) # works splat_kwargs({x: 1, y: 2}) # raises an ArgumentError splat_kwargs(**{x: 1, y: 2}) # works
...easily loose track of the desired example. Nesting index syntax looks like this: spec/models/user_spec.rb[1:2:1]. It describes a path in the nesting tree of the spec file, with...
...1-based indexes. Example # spec/models/user_spec.rb describe User do it 'validates presence of its email address' describe '#full_name' do it 'combines first and last name' it 'does not crash if...
...in strings will be sorted character by character which you probably don't want: ["1", "2", "11"].sort # => ["1", "11", "2"] # you probably expected ["1", "2", "11"] Also the sorting...
You can now say: ["Schwertner", "Schöler"].sort_by(&:to_sort_atoms) #=> ["Schöler", "Schwertner"] ["1", "2", "11"].sort_by(&:to_sort_atoms) # => ["1", "2", "11"] ["a", "B"].sort_by(&:to...
...mentioned below for your deployment on request. If you're lucky DO_NOT_TRACK=1 opts you out of CLI telemetry - it's not widely adopted. When you're using...
...yarn config set --home enableTelemetry 0 Next.js https://nextjs.org/telemetry export NEXT_TELEMETRY_DISABLED=1 Prisma https://www.prisma.io/docs/orm/tools/prisma-cli#telemetry export CHECKPOINT_DISABLE=1 Angular https://angular.io/cli/analytics Note: The default...
...be formatted using the user's language settings. For example, German users will see 1,23 for . Values in the JavaScript API or when submitting forms to the server will...
...always use a point as decimal separator (i.e. "1.23" even when the browser displays 1,23). You don't need any "conversion" hacks which try to replace commas with dots...
1. Saving files to a directory that is not shared between deploys or servers If you save your uploads to a made up directory like "RAILS_ROOT/uploads", this directory goes...
...one path like "public/system/images/4.jpg" and then replacing the record ID (4) with values from 1 to 9999999999. So don't store confidential stuff in there. Non-public files should by...
...through looking at the stash: $ git stash list stash@{0}: WIP on feature/foo stash@{1}: WIP on feature/bar stash@{2}: WIP on fix/baz Now you can simply use that reference...
...but curly braces must be escaped: git stash pop stash@\{1\} or quoted: git stash apply "stash@{1}" Quick reminder to not shoot yourself in the foot: apply applies the...
...priority queue if many image records and versions are affected. References sRGB v4 ISO 15076-1 The International Color Consortium, stating: The v4 ICC specification is widely used and is...
...and other de-facto standards. It was first approved as an International Standard, ISO 15076-1, in 2005 and revised in...
Tested on Ubunut 22.04 1. Opener script Create a file ~/.local/bin/coverage_zip_opener with: #!/bin/bash tmp_folder="/tmp/coverage-report-opener" if [ -z "$1" ] then echo "Usage: coverage_zip_opener [filename]" exit -1 fi
...1" =~ ^.*Pipeline.*Coverage.*\.zip$ || "$1" =~ ^.*merged_coverage_report.*\.zip$ ]]; then file-roller "$1" exit 0 fi rm -Rf $tmp_folder unzip -qq "$1" -d $tmp_folder index_filename=$(find /tmp/coverage-report-opener...
...following processes to split up the changes into several commits in a logical order: #1 Splitting up the last n commits into m commits #2 Adding changes to a previous...
...creating new commits) 3.1 Splitting up 3.2 Adding to later commits #4 Reordering commits #1 Splitting up the last n commits into m commits If you decide to split up...