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How to find index of list item in Swift?
...rr.index(of: "a")
A detailed documentation of the method can be found at https://developer.apple.com/reference/swift/array/1689674-index
For array items that don't conform to Equatable you'll need to use index(where:):
let index = cells.index(where: { (item) -> Bool in
item.foo == 42 // tes...
How to work with Git branches and Rails migrations
...I wrote for switching between branches that contain different migrations:
https://gist.github.com/4076864
It won't solve all the problems you mentioned, but given a branch name it will:
Roll back any migrations on your current branch which do not exist on the given branch
Discard any changes to ...
Android emulator: How to monitor network traffic?
...
What about https traffic
– pee2pee
Dec 21 '16 at 22:38
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How do I make background-size work in IE?
...
you can use this file
(https://github.com/louisremi/background-size-polyfill “background-size polyfill”) for IE8 that is really simple to use:
.selector {
background-size: cover;
-ms-behavior: url(/backgroundsize.min.htc);
}
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How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...ons that might occur.
Cross-posting from another answer I gave yesterday (https://stackoverflow.com/a/44395983/2156909)
SQLAlchemy supports ON CONFLICT now with two methods on_conflict_do_update() and on_conflict_do_nothing():
Copying from the documentation:
from sqlalchemy.dialects.postgresql i...
Run/install/debug Android applications over Wi-Fi?
...nect and manage your devices easily....... for more information read here https://github.com/pedrovgs/AndroidWiFiADB
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Sass Variable in CSS calc() function
...strongly suggest you to understand transform-origin, rotate() and skew():
https://tympanus.net/codrops/2013/08/09/building-a-circular-navigation-with-css-transforms/
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...
Read stream twice
...read image, then use :
BufferedImage image = ImageIO.read(new URL("http://www.example.com/images/toto.jpg"));
Using ImageIO#read(java.net.URL) also allows you to use cache.
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What is a vertical tab?
...a data field,
FileMaker databases can use vertical tabs as a linefeed (see https://support.microsoft.com/en-gb/kb/59096).
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Specifying rails version to use when creating a new application
...ew Rails 4.2.9 projects the steps are:
mkdir myapp
cd myapp
echo "source 'https://rubygems.org'" > Gemfile
echo "gem 'rails', '4.2.9'" >> Gemfile
bundle install
bundle exec rails new . --force --skip-bundle
bundle update
...