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Finding out whether a string is numeric or not
...return 'YES' for that string, per the documentation, having found "a valid integer representation". Furthermore, it did exactly that in a test on iOS 4.3.2. However, NSNumberFormatter did return nil.
– Tommy
May 23 '11 at 10:56
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What does this symbol mean in JavaScript?
...This is also a Community Wiki, so everyone is invited to participate in maintaining this list.
1 Answer
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Short circuit Array.forEach like calling break
... one where callback returns a truthy value (a value that becomes true when converted to a Boolean). If such an element is found, some() immediately returns true. Otherwise, some() returns false. callback is invoked only for indexes of the array which have assigned values; it is not invoked for index...
Why are mutable structs “evil”?
...bjects tend to have multiple properties; yet if you have a struct with two ints, a string, a DateTime and a bool, you can very quickly burn through a lot of memory. With a class, multiple callers can share a reference to the same instance (references are small).
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Select top 10 records for each category
... This works, but be aware that rank() is likely to be turned into a full table sort by the query planner if there isn't an index who's first key is the RankCriteria. In this case you may get better mileage selecting the distinct sections and cross applying to pick out the top 10 ordere...
Printing tuple with string formatting in Python
So, i have this problem.
I got tuple (1,2,3) which i should print with string formatting.
eg.
14 Answers
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Android: Remove all the previous activities from the back stack
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The solution proposed here worked for me:
Java
Intent i = new Intent(OldActivity.this, NewActivity.class);
// set the new task and clear flags
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(i);
Kotlin
val i = Intent(this, New...
Google Docs/Drive - number the headings
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@MrGravity the way to achieve that is to convert the script into a Add-On for Google Drive I plan in doing that but am out of time now..
– Luciano
Jul 11 '14 at 14:21
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JavaScript null check
... @afsantos: in reality I don't think that many (any?) values will convert to null; however, it's a best practice to use strict comparison (===) unless you really know what you're doing and want comparison after conversion (==).
– maerics
May 21 '13 at ...
select into in mysql
I am a MSSQL user and now I am converting my database to MySQL. I am writing the following query in MySQL:
2 Answers
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