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Why not abstract fields?
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"the compiler will give a warning". Actually, the Child constructor would be trying to use a non-existent noargs constructor and that is a compilation error (not a warning).
– Stephen C
Feb 6 '10 at 0:15
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Naming returned columns in Pandas aggregate function? [duplicate]
...er, this does not work with lambda functions, since they are anonymous and all return <lambda>, which causes a name collision:
>>> df.groupby('A').agg({'B': [lambda x: x.min(), lambda x: x.max]})
SpecificationError: Function names must be unique, found multiple named <lambda>
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How do I retrieve an HTML element's actual width and height?
... done certain DOM modifications to the element recently. You may have to call this code in a setTimeout call after you've modified the element.
– Dan Fabulich
Jan 19 '10 at 5:59
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Way to get all alphabetic chars in an array in PHP?
Is there a way to get all alphabetic chars (A-Z) in an array in PHP so I can loop through them and display them?
14 Answers...
How to print matched regex pattern using awk?
...search for pattern using //, then print out the line, which by default is called a record, denoted by $0. At least read up the documentation.
If you only want to get print out the matched word.
awk '{for(i=1;i<=NF;i++){ if($i=="yyy"){print $i} } }' file
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How do you list the primary key of a SQL Server table?
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Actually, I believe you have to also constrain by Schema, right? So, you'd need to add "And COL.TABLE_SCHEMA = '<your schema name>'" as well.
– DavidStein
May 17 '13 at 15:56
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Convert timedelta to total seconds
...ime.datetime.fromtimestamp(time.mktime(time.gmtime())) expression.
(1) If all you need is the difference between two instants in seconds, the very simple time.time() does the job.
(2) If you are using those timestamps for other purposes, you need to consider what you are doing, because the result ...
Convert java.util.Date to String
...Date has no idea about TimeZone, Locale, or any of that good stuff that we all never use.
– nckbrz
Mar 13 '14 at 22:40
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C# Float expression: strange behavior when casting the result float to int
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First of all, I assume that you know that 6.2f * 10 is not exactly 62 due to floating point rounding (it's actually the value 61.99999809265137 when expressed as a double) and that your question is only about why two seemingly identic...
How can I test a Windows DLL file to determine if it is 32 bit or 64 bit? [duplicate]
I'd like to write a test script or program that asserts that all DLL files in a given directory are of a particular build type.
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