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Finding the type of an object in C++
I have a class A and another class that inherits from it, B. I am overriding a function that accepts an object of type A as a parameter, so I have to accept an A. However, I later call functions that only B has, so I want to return false and not proceed if the object passed is not of type B.
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Select statement to find duplicates on certain fields
...ach in the link above. Based on that you'll need to use an order by clause and a sub query if needed. If you can post some sample data, it would really help.
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What does a lazy val do?
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In contrast to a method (defined with def) a lazy val is executed once and then never again. This can be useful when an operation takes long time to complete and when it is not sure if it is later used.
scala> class X { val x = { Thread.sleep(2000); 15 } }
defined class X
scala> class Y ...
How to log request and response body with Retrofit-Android?
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I used setLogLevel(LogLevel.FULL).setLog(new AndroidLog("YOUR_LOG_TAG")), it helped me.
UPDATE. You can also try for debug purpose use retrofit.client.Response as response model
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How can I detect when an Android application is running in the emulator?
... development server automatically.) What is the best way to detect when an Android application is running in the emulator?
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Retrieving the output of subprocess.call() [duplicate]
...Popen() instead. Then you can pass subprocess.PIPE for the stderr, stdout, and/or stdin parameters and read from the pipes by using the communicate() method:
from subprocess import Popen, PIPE
p = Popen(['program', 'arg1'], stdin=PIPE, stdout=PIPE, stderr=PIPE)
output, err = p.communicate(b"input ...
How do you use script variables in psql?
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Postgres variables are created through the \set command, for example ...
\set myvariable value
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SELECT * FROM :myvariable.table1;
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SELECT * FROM table1 WHERE :myvariable IS NULL;
edit: As of psql 9.1, varia...
Static and Sealed class differences
... of other types, based of this. Like some root class that can be inherited and instantiated, but can't inherit. Not sure why that'd be useful, but still
– AustinWBryan
May 20 '18 at 3:41
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What is the difference between a User Control Library and a Custom Control Library?
I am just coming up to speed on WPF and would like to create a reusable WPF control.
2 Answers
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warning: implicit declaration of function
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@Flimm, C99 and C89/C90 has different setting for this
– How Chen
Jan 15 '15 at 6:06
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