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Is there a way that I can check if a data attribute exists?
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edited Aug 22 '18 at 12:53
James McCormack
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Throw keyword in function's signature
What is the technical reason why it is considered bad practice to use the C++ throw keyword in a function signature?
7 An...
How do I execute code AFTER a form has loaded?
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To me it seems like the shown handler is executed WHILE the form is loading... am i wrong?
– ckonig
Feb 14 '13 at 15:50
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JavaScript check if variable exists (is defined/initialized)
Which method of checking if a variable has been initialized is better/correct?
(Assuming the variable could hold anything (string, int, object, function, etc.))
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stringstream, string, and char* conversion confusion
...g returned from stringstream.str().c_str() live in memory, and why can't it be assigned to a const char* ?
5 Answers
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What are the basic rules and idioms for operator overloading?
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Most of the work in overloading operators is boiler-plate code. That is little wonder, since operators are merely syntactic sugar, their actual work could be done by (and often is forwarded to) plain functions. But it is important that you get this boiler-plate code right. If you fail, either your...
Multi-Line Comments in Ruby?
...ine comments.
The =begin and =end must be at the beginning of the line or
it will be a syntax error.
=end
puts "Hello world!"
<<-DOC
Also, you could create a docstring.
which...
DOC
puts "Hello world!"
"..is kinda ugly and creates
a String instance, but I know one guy
with a Smalltalk bac...
chrome undo the action of “prevent this page from creating additional dialogs”
...re-enable alerting for debugging. Of course I can close the tab and reload it but Is there a better way?
7 Answers
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What are the use cases for selecting CHAR over VARCHAR in SQL?
...R (or NVARCHAR) when the length varies significantly. CHAR may also be a bit faster because all the rows are of the same length.
It varies by DB implementation, but generally, VARCHAR (or NVARCHAR) uses one or two more bytes of storage (for length or termination) in addition to the actual data. So...
What's the difference between a Future and a Promise?
...ise has finally been called CompletableFuture for inclusion in Java 8, and its javadoc explains:
A Future that may be explicitly completed (setting its value and status), and may be used as a CompletionStage, supporting dependent functions and actions that trigger upon its completion.
An exa...