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quick random row selection in Postgres
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PostgreSQL 9.5 introduced a new approach for much faster sample selection: TABLESAMPLE
The syntax is
SELECT * FROM my_table TABLESAMPLE BERNOULLI(percentage);
SELECT * FROM my_table TABLESAMPLE SYSTEM(percentage);
This is not the optimal solution i...
How does HashSet compare elements for equality?
...though very accurate this answer may be somewhat confusing, especially for new users as it doesn't clearly state that for the simplest case overriding Equals and GetHashCode is enough - as mentioned in @tyriker's answer.
– BartoszKP
Oct 2 '13 at 7:35
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Why does PHP 5.2+ disallow abstract static class methods?
...works fine in PHP 5.3 and above. You can read more about self vs static at New self vs. new static.
With the static keyword added, the clear argument for having abstract static throw a warning was gone. Late static bindings' main purpose was to allow methods defined in a parent class to call stati...
Fluid or fixed grid system, in responsive design, based on Twitter Bootstrap
...imum width. Then when you shrink your browser to 959px, it will snap to a new layout based on a media query that has a maximum width of 768px. So because you are viewing a fixed-width layout, the columns will not change when your browser width is between 768 and 960.
– eterps...
What does the LayoutInflater attachToRoot parameter mean?
...he scenario when passing attachRoot as false:
LinearLayout linearLayout = new LinearLayout(context);
linearLayout.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
linearLayout.setOrientation(LinearLayout.VERTICAL);
// Create a stand-alone view
View m...
Building and running app via Gradle and Android Studio is slower than via Eclipse
...ect_builds.html#sec:decoupled_projects
org.gradle.parallel=true
# Enables new incubating mode that makes Gradle selective when configuring projects.
# Only relevant projects are configured which results in faster builds for large multi-projects.
# http://www.gradle.org/docs/current/userguide/multi...
Purpose of Django setting ‘SECRET_KEY’
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@AdamParkin, that sounds like a good start for a new question, to get its own answer.
– bignose
Aug 2 '18 at 9:54
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Error-Handling in Swift-Language
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Swift 2 & 3
Things have changed a bit in Swift 2, as there is a new error-handling mechanism, that is somewhat more similar to exceptions but different in detail.
1. Indicating error possibility
If function/method wants to indicate that it may throw an error, it should contain throws ke...
Programmatically go back to the previous fragment in the backstack
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@MurtazaHussain you should probably ask a new question if you want help with this. It's a little hard to see what's going on without looking at more code.
– Kyle Falconer
Nov 3 '13 at 15:24
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Why does installing Nokogiri on Mac OS fail with libiconv is missing?
...to allow you to install libiconv.
xcode-select --install
then install a newer version of libiconv
brew install libiconv
then install your gem
gem install nokogiri -- --with-iconv-dir=/usr/local/Cellar/libiconv/1.14
s...