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Default parameters with C++ constructors [closed]
...efault parameters, or should I use separate overloaded constructors? For example:
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How can I export tables to Excel from a webpage [closed]
How can I export tables to Excel from a webpage. I want the export to contain all the formatting and colours.
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Why should I prefer single 'await Task.WhenAll' over multiple awaits?
... (faulted or canceled tasks). Awaiting manually in sequence would cause unexpected concurrency because the part of your program that wants to wait will actually continue early.
I think it also makes reading the code easier because the semantics that you want are directly documented in code.
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Parser Error Message: Could not load type 'TestMvcApplication.MvcApplication'
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rmagick gem install “Can't find Magick-config”
...uilding native Ruby gems, sometimes you'll get an error containing "ruby extconf.rb". This is often caused by missing development libraries for the gem you're installing, or even Ruby itself.
Do you have apt installed on your machine? If not, I'd recommend installing it, because it's a quick and e...
What does O(log n) mean exactly?
...s the growth of the algorithm proportionally...and the same goes for, for example, quadratic time O(n2) etc..even algorithms, such as permutation generators, with O(n!) times, that grow by factorials.
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In Rails - is there a rails method to convert newlines to ?
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Yes, rails has simple_format which does exactly what you are looking for, and slightly better since it also adds paragraph tags. See
http://api.rubyonrails.org/classes/ActionView/Helpers/TextHelper.html#method-i-simple_format
Example:
simple_format(mystring)
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PostgreSQL - max number of parameters in “IN” clause?
...to the source code located here, starting at line 850, PostgreSQL doesn't explicitly limit the number of arguments.
The following is a code comment from line 870:
/*
* We try to generate a ScalarArrayOpExpr from IN/NOT IN, but this is only
* possible if the inputs are all scalars (no RowExprs) a...
How do I check if a string contains another string in Objective-C?
... "haystack" does not contain the "needle".
And if you're on iOS 8 or OS X Yosemite, you can now do: (*NOTE: This WILL crash your app if this code is called on an iOS7 device).
NSString *string = @"hello bla blah";
if ([string containsString:@"bla"]) {
NSLog(@"string contains bla!");
} else {
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Is there a Python equivalent to Ruby's string interpolation?
Ruby example:
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