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How to create a protocol with methods that are optional?
...rom the Apple page on "Formal Protocols":
Optional Protocol
methods can be marked as optional
using the @optional keyword.
Corresponding to the @optional modal
keyword, there is a @required keyword
to formally denote the semantics of
the default behavior. You can use
@optional and...
What Regex would capture everything from ' mark to the end of a line?
...
This will capture first instance of character ' and end of last line
– killdaclick
Jun 10 '19 at 20:00
add a c...
Filtering a list of strings based on contents
...h strings that have 'ab' in them. I.e. the result is ['ab','abc'] . How can this be done in Python?
5 Answers
...
How to set working/current directory in Vim?
...:e command I don't want to specify the whole path, just the new filename. Can it be done?
6 Answers
...
How to change the playing speed of videos in HTML5?
... @Sushan .querySelector returns the first matching one. You can use .querySelectorAll, but you need to iterate through them instead of directly using the code in these answers.
– leewz
Jul 6 '17 at 5:01
...
how to fire event on file select
...ent doesn't trigger when I select the same file again. Any other way which can work every time?
– Tᴀʀᴇǫ Mᴀʜᴍᴏᴏᴅ
Dec 21 '17 at 13:07
1
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Check if list contains any of another list
... of O(n^2) for the first approach (the equivalent of two nested loops) you can do the check in O(n) :
bool hasMatch = parameters.Select(x => x.source)
.Intersect(myStrings)
.Any();
Also as a side comment you should capitalize your class name...
postgresql - add boolean column to table set default
...
ALTER TABLE users
ADD COLUMN "priv_user" BOOLEAN DEFAULT FALSE;
you can also directly specify NOT NULL
ALTER TABLE users
ADD COLUMN "priv_user" BOOLEAN NOT NULL DEFAULT FALSE;
UPDATE: following is only true for versions before postgresql 11.
As Craig mentioned on filled tables it is mor...
How to disable/enable the sleep mode programmatically in iOS?
...f a countdown but it will go into 'sleep mode' whenever it reaches the allocated time to sleep.
4 Answers
...
Passing a function with parameters as a parameter?
...unction wrapper that knows about the parameter and passes it to the actual callback implementation.
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