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C++ catching all exceptions
...ered bad design. You can use c++11's new current_exception mechanism, but if you don't have the ability to use c++11 (legacy code systems requiring a rewrite), then you have no named exception pointer to use to get a message or name. You may want to add separate catch clauses for the various exce...
How to Test a Concern in Rails
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Works great now. Thanks for pointing me in the right direction and helping me refactor @Russell
– Kyle Decot
May 14 '13 at 13:14
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Precision String Format Specifier In Swift
...59265359 formatted with ".3" looks like 3.142
I think this is the most Swift-like solution, tying the formatting operations directly to the data type. It may well be that there is a built-in library of formatting operations somewhere, or maybe it will be released soon. Keep in mind that the langua...
VB.NET equivalent to C# var keyword [duplicate]
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Option Infer must be on in order for this to function properly. If so, then omitting the type in VB.NET (Visual Basic 9) will implicitly type the variable.
This is not the same as "Option Strict Off" in previous versions of VB.NET, as the variable is strongly-typed; it's just done so imp...
Drop data frame columns by name
...hose still not acquainted with the drop argument of the indexing function, if you want to keep one column as a data frame, you do:
keeps <- "y"
DF[ , keeps, drop = FALSE]
drop=TRUE (or not mentioning it) will drop unnecessary dimensions, and hence return a vector with the values of column y.
...
How to detect if CMD is running as Administrator/has elevated privileges?
...solution here: http://www.robvanderwoude.com/clevertricks.php
AT > NUL
IF %ERRORLEVEL% EQU 0 (
ECHO you are Administrator
) ELSE (
ECHO you are NOT Administrator. Exiting...
PING 127.0.0.1 > NUL 2>&1
EXIT /B 1
)
Assuming that doesn't work and since we're talking Win7 ...
What is the difference between precision and scale?
What is the difference between precision and scale in Oracle? In tutorials they usually leave scale empty and set precision to 6 when creating a primary key.
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Cocoa Touch: How To Change UIView's Border Color And Thickness?
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Is there any way to set different width/colors for every side?
– lluismontero
Oct 10 '11 at 16:13
2
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Counter increment in Bash loop not working
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(( COUNTER++ ))
looks more "modern". You can also use
let COUNTER++
if you think that improves readability. Sometimes, Bash gives too many ways of doing things - Perl philosophy I suppose - when perhaps the Python "there is only one right way to do it" might be more appropriate. That's a deba...
How to create a MySQL hierarchical recursive query
...cte
on p.parent_id = cte.id
)
select * from cte;
The value specified in parent_id = 19 should be set to the id of the parent you want to select all the descendants of.
MySQL 5.x
For MySQL versions that do not support Common Table Expressions (up to version 5.7), you would achieve this ...