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SQL Query to concatenate column values from multiple rows in Oracle
...ed and unsupported by Oracle, it's recommended not to use it in production system.
With XMLAGG you can do the following:
SELECT XMLAGG(XMLELEMENT(E,ename||',')).EXTRACT('//text()') "Result"
FROM employee_names
What this does is
put the values of the ename column (concatenated with a comma) fr...
How can I check if a Perl array contains a particular value?
...smartmatch' is recommended. As I have control of my perl version (internal system), I use the no warnings 'experimental::smartmatch'; statement.
– lepe
Jan 7 '16 at 2:39
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How to get Linux console window width in Python
...LUMNS"] value would only be valid for the time of the launch of the python interpreter (suppose the user resized the window since then).
(See answer by @GringoSuave on how to do this on python 3.3+)
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Checking whether a variable is an integer or not [duplicate]
...x/x.).is_integer():
# do something special
Edit:
You can always convert to a float before calling this method. The three possibilities:
>>> float(5).is_integer()
True
>>> float(5.1).is_integer()
False
>>> float(5.0).is_integer()
True
Otherwise, you could chec...
Parse v. TryParse
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If the string can not be converted to an integer, then
int.Parse() will throw an exception
int.TryParse() will return false (but not throw an exception)
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How to convert NSNumber to NSString
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The funny thing is that NSNumber converts to string automatically if it becomes a part of a string. I don't think it is documented.
Try these:
NSLog(@"My integer NSNumber:%@",[NSNumber numberWithInt:184]);
NSLog(@"My float NSNumber:%@",[NSNumber numberWithF...
How to convert std::string to LPCWSTR in C++ (Unicode)
I'm looking for a method, or a code snippet for converting std::string to LPCWSTR
6 Answers
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Search and replace a line in a file in Python
...tles. For example, it can be used to automatically operate on all files in sys.args[1:], without your having to iterate over them explicitly. Starting with Python 3.2 it also provides a convenient context manager for use in a with statement.
While fileinput is great for throwaway scripts, I would...
How to delete all rows from all tables in a SQL Server database?
...- Disable all constraints on the database by using below sql query :
EXEC sys.sp_msforeachtable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
Step 2- Execute a Delete or truncate operation on each table of the database by using below sql command :
EXEC sys.sp_msforeachtable 'DELETE FROM ?'
Step 3- En...
How to convert a String to its equivalent LINQ Expression Tree?
...edicate and compiled. Question appears to be,, getting your grammar to be converted from 'string' to 'predicate'. // Lambda expression as data in the form of an expression tree. System.Linq.Expressions.Expression<Func<int, bool>> expr = i => i < 5; // Compile the expression tree ...