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C++ template constructor
...eates a derived class object and assigns it to a member variable that is a base class pointer. (The constructor needs to know which derived class to use, but the class itself doesn't need to be templated since the same base class pointer type is always used.)
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Java associative-array
...ped, however has less elegant syntax/API.
This is the closest you can get based on your example:
Map<Integer, Map<String, String>> arr =
org.apache.commons.collections.map.LazyMap.decorate(
new HashMap(), new InstantiateFactory(HashMap.class));
//$arr[0]['name'] = 'demo'...
What is the difference between Google App Engine and Google Compute Engine?
...install all the software that you want, which is usually a web server, database, etc...
In app engine you don't manage the operating system of any of the underlying software. You only upload code (Java, PHP, Python, or Go) and voila - it just runs...
App engine saves tons of headache, especially ...
Command line CSV viewer? [closed]
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For those not on Debian-base distros, this tool seems to originate from here: docs.camlcity.org/docs/godisrc/ocaml-csv-1.1.6.tar.gz Unfortunately the "homepage" link is dead, and I don't see an easy way to download the whole archive in a go.
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Removing colors from output
... Changing the first ? out for * should help. Handling sgr0 is possible but based on a search it likely grows outside the scope of this hacky regex-based answer.
– Jeff Bowman
Feb 23 '16 at 18:37
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maximum value of int
... trivially extended for unsigned types:
// We can use it to define limits based on actual compiler built-in types also:
#define INT_MAX SIGNED_MAX(int)
// based on the above, we can extend it for unsigned types also:
#define UNSIGNED_MAX(x) ( (SIGNED_MAX(x)<<1) | 1 ) // We reuse SIGNED_MA...
How to print an exception in Python?
... are going to print the exception, it is better to use print(repr(e)); the base Exception.__str__ implementation only returns the exception message, not the type. Or, use the traceback module, which has methods for printing the current exception, formatted, or the full traceback.
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Is there a point to minifying PHP?
...ity of users.
Facebook also recently unveiled HHVM, a new virtual machine based on their work making HipHop. It's still rather new and it's not clear if it will provide a major performance boost to the general public.
Just to make sure it's stated expressly, please read that presentation in full....
How do you delete a column by name in data.table?
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@user3969377 if you want to remove a column based on the contents of a character variable you'd simply wrap it in parenthesis. Ie. df[,(afoo):=NULL]
– Dean MacGregor
Jul 9 '15 at 19:26
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Script entire database SQL-Server
...y I can get a scripting of all tables, procs, and other objects from a database? I know there's an option to script the database but it only gave me some sort of top level script, certainly not a script to create all tables, procs, udfs, .etc.
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