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When should we use Observer and Observable?
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In very simple terms (because the other answers are referring you to all the official design patterns anyway, so look at them for further details):
If you want to have a class which is monitored by other classes in the ecosystem of your program you say that you want the class to be observable...
Underscore prefix for property and method names in JavaScript
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Welcome to 2019!
It appears a proposal to extend class syntax to allow for # prefixed variable to be private was accepted. Chrome 74 ships with this support.
_ prefixed variable names are considered private by convention but are still public.
This syntax tries to be both terse and int...
PHP Composer update “cannot allocate memory” error (using Laravel 4)
... you should be committing your composer.lock file and doing a composer install on a production environment which is less resource intensive.
More details here:
https://github.com/composer/composer/issues/1898#issuecomment-23453850
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SQLite UPSERT / UPDATE OR INSERT
...answer. Starting from SQLIte 3.24.0, released on June 4, 2018, there is finally a support for UPSERT clause following PostgreSQL syntax.
INSERT INTO players (user_name, age)
VALUES('steven', 32)
ON CONFLICT(user_name)
DO UPDATE SET age=excluded.age;
Note: For those having to use a vers...
Best practice to run Linux service as a different user
...ervices default to starting as root at boot time on my RHEL box. If I recall correctly, the same is true for other Linux distros which use the init scripts in /etc/init.d .
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Good tutorial for using HTML5 History API (Pushstate?) [closed]
...great tutorial the Mozilla Developer Network page on this functionality is all you'll need: https://developer.mozilla.org/en/DOM/Manipulating_the_browser_history
Unfortunately, the HTML5 History API is implemented differently in all the HTML5 browsers (making it inconsistent and buggy) and has no f...
How to solve “Plugin execution not covered by lifecycle configuration” for Spring Data Maven Builds
..., in order to avoid the exceptions in Eclipse, one needs to simply enclose all the plugin tags inside a <pluginManagement> tag, like so:
<build>
<pluginManagement>
<plugins>
<plugin> ... </plugin>
<plugin> ... </plugin...
How line ending conversions work with git core.autocrlf between different operating systems
...rojects has been making my life miserable for a long time. The problems usually arise when there are already files with different and mixed EOLs already in the repo. This means that:
The repo may have different files with different EOLs
Some files in the repo may have mixed EOL, e.g. a combination...
Disable autocomplete via CSS
... it possible to use CSS to disable autocomplete on a form element (specifically a textfield)?
12 Answers
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Get Android Device Name [duplicate]
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Actually, I find that Build.MODEL is the model name, for instance mine show "Nexus 7" and "Motorola Electrify" on my devices.
– Tony Maro
Feb 1 '13 at 19:42
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