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On design patterns: When should I use the singleton?
The glorified global variable - becomes a gloried global class. Some say breaking object-oriented design.
19 Answers
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Android 4.1: How to check notifications are disabled for the application?
...id 4.1 offers the user a check box to disable notifications for a specific application.
6 Answers
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Detecting an undefined object property
...ut it won’t throw an error!
}
So unless you’re doing feature detection², where there’s uncertainty whether a given name will be in scope (like checking typeof module !== 'undefined' as a step in code specific to a CommonJS environment), typeof is a harmful choice when used on a variable, and...
How can I check if a string represents an int, without using try/except?
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note: u'²'.isdigit() is true but int(u'²') raises ValueError. Use u.isdecimal() instead. str.isdigit() is locale-dependent on Python 2.
– jfs
Oct 19 '14 at 6:02
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Send message to specific client with socket.io and node.js
... disconnect listener.
I would use the latter one, since depending on your application you might want to have more state on the clients anyway, so something like clients[id] = {conn: clientConnect, data: {...}} might do the job.
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Check to see if a string is serialized?
...r.wordpress.org/reference/functions/is_serialized
– Cédric Françoys
Feb 22 '19 at 8:57
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How to list of all the tables defined for the database when using active record?
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An update for Rails 5.2
For Rails 5.2 you can also use ApplicationRecord to get an Array with your table' names. Just, as imechemi mentioned, be aware that this method will also return ar_internal_metadata and schema_migrations in that array.
ApplicationRecord.connection.tables
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How do you reverse a string in place in C or C++?
...it, nor the patience to use a hexeditor)
Examples:
$ ./strrev Räksmörgås ░▒▓○◔◑◕●
░▒▓○◔◑◕● ●◕◑◔○▓▒░
Räksmörgås sågrömskäR
./strrev verrts/.
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Confused about Service vs Factory
...vices
Lastly, it is important to realize that all Angular services are application singletons. This means that there is only one instance of a given service per injector.
Basically the difference between the service and factory is as follows:
app.service('myService', function() {
// servi...
Difference between datetime and timestamp in sqlserver? [duplicate]
What is the difference between Timestamp and Datetime SQL Server?
2 Answers
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