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How to think in data stores instead of databases?
As an example, Google App Engine uses Google Datastore, not a standard database, to store data. Does anybody have any tips for using Google Datastore instead of databases? It seems I've trained my mind to think 100% in object relationships that map directly to table structures, and now it's hard t...
Android Camera : data intent returns null
I have an android application which contains multiple activities.
11 Answers
11
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How do I run a spring boot executable jar in a Production environment?
...t jar to init.d or use a systemd script.
init.d example:
$ln -s /var/yourapp/yourapp.jar /etc/init.d/yourapp
This allows you to start, stop and restart your application like:
$/etc/init.d/yourapp start|stop|restart
Or use a systemd script:
[Unit]
Description=yourapp
After=syslog.target
[Ser...
How can I make the Android emulator show the soft keyboard?
... found out how to do this on the Android emulator itself (Menu, "Settings" App - not the settings of the emulator outside). All you need to do is:
open settings app -> Language & Input -> Go to the "Keyboard & Input Methods -> click Default
This will bring up a Dialog in which case ...
Postgres: “ERROR: cached plan must not change result type”
This exception is being thrown by the PostgreSQL 8.3.7 server to my application.
Does anyone know what this error means and what I can do about it?
...
What Are the Differences Between PSR-0 and PSR-4?
...s something like 'relative path', PSR-0, 'absolute path'.
e.g.
config:
'App\Controller' => 'dir/'
PSR-0 autoload:
App\Controller\IndexController --> dir/App/Controller/IndexController.php
PSR-4 autoload:
App\Controller\IndexController --> dir/IndexController.php
And there are som...
How to call a method defined in an AngularJS directive?
.../ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="directiveControlDemo">
<div ng-controller="MainCtrl">
<button ng-click="focusinControl.takeTablet()">Call directive function</button>
<p>
<b>In controller scope:</b...
Scratch还是App Inventor？低代码编程工具2026终极横评：谁才是真正的入门...
Scratch还是App Inventor？低代码编程工具2026终极横评：谁才是真正的入门之王
十年前，"学编程"意味着啃厚厚的C语言教材；到了2026年，低代码和可视化编程工具已经彻底重塑了编程教育的格局。无论你是想给孩子找一门...
Android Studio with Google Play Services
...lly
If you have imported your project or are working from the Sample Maps application located in \extras\google\google_play_services\samples\maps check out this tutorial.
https://stackoverflow.com/a/16598478/2414698
If you are creating a new project from scratch then note Xav's comments on that s...
How to programmatically empty browser cache?
...y to programmatically empty the browser cache. I am doing this because the application caches confidential data and I'd like to remove those when you press "log out". This would happen either via server or JavaScript. Of course, using the software on foreign/public computer is still discouraged as t...