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Serializing class instance to JSON
...coders-and-decoders
One good solution would be to make your class inherit from JSONEncoder and then implement the JSONEncoder.default() function, and make that function emit the correct JSON for your class.
A simple solution would be to call json.dumps() on the .__dict__ member of that instance. ...
Background image jumps when address bar hides iOS/Android/Mobile Chrome
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EDIT: While the above script works perfectly for keeping the background from resizing, it causes a noticeable gap when users scroll down. This is because it is keeping the background sized to 100% of the screen height minus the URL bar. If we add 60px to the height, as swiss suggests, this proble...
How does one generate a random number in Apple's Swift language?
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Warning: RC4 or arc4 has been shown to be distinguishable from pure random values. So although arc4 (a stream cipher) sounds cryptographically secure, it actually isn't.
– Maarten Bodewes
Jun 8 '18 at 2:11
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How to handle invalid SSL certificates with Apache HttpClient? [duplicate]
...to Pascal Thivent's correct answer, another way is to save the certificate from Firefox (View Certificate -> Details -> export) or openssl s_client and import it into the trust store.
You should only do this if you have a way to verify that certificate. Failing that, do it the first time you ...
Converting string to byte array in C#
I'm converting something from VB into C#. Having a problem with the syntax of this statement:
16 Answers
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Match everything except for specified strings
... can do it like this:
^(?!(red|green|blue)$).*$
This says, start the match from the beginning of the string where it cannot start and end with red, green, or blue and match anything else to the end of the string.
You can try it here: https://regex101.com/r/rMbYHz/2
Note that this only works with reg...
How to fix “Headers already sent” error in PHP
...k for premature output.
Typical causes:
Print, echo
Intentional output from print and echo statements will terminate
the opportunity to send HTTP headers. The application flow must
be restructured to avoid that. Use functions
and templating schemes. Ensure header() calls occur before messages
ar...
What is the meaning of the CascadeType.ALL for a @ManyToOne JPA association
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See here for an example from the OpenJPA docs. CascadeType.ALL means it will do all actions.
Quote:
CascadeType.PERSIST: When persisting an entity, also persist the entities held in its fields. We suggest a liberal application of this cascade rule,...
Android: how do I check if activity is running?
...efly.
Depending on what you are trying to do (update the current activity from a service?). You could just register a static listener in the service in your activity onStart method then the correct listener will be available when your service wants to update the UI.
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How to format date in angularjs
...not sure why my answer was downvoted. This answer is taken almost verbatim from Angular's docs. The mention of jQueryUI datepicker format strings is because the module being used in the question is ui-date which has a dependency on jQuery and jQueryUI. There's nothing incorrect or misleading in the ...