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In CSS what is the difference between “.” and “#” when declaring a set of styles?
...here the style is repeated, e.g. say you head a special form of header for error messages, you could create a style h1.error {} which would only apply to <h1 class="error">
Specificity
Another aspect where selectors differ is in their specificity - an id selector is deemed to be more specifi...
What is the purpose of std::make_pair vs the constructor of std::pair?
...cpp
fails with:
main.cpp: In function ‘int main()’:
main.cpp:13:13: error: missing template arguments before ‘my_class’
MyClass my_class(1);
^~~~~~~~
and requires instead to work:
MyClass<int> my_class(1);
or the helper:
auto my_class = make_my_class(1);
wh...
Missing XML comment for publicly visible type or member
...erties (in 'Project properties' go to Project properties -> Build > "Errors and warnings" (section), Suppress Warnings (textbox), add 1591 (comma separated list)). By default it will change Active Configuration, consider to change configuration to All.
Use #pragma warning disable 1591 to disab...
What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
...rameter is present, and if it's not provided, the require method throws an error. It returns an instance of ActionController::Parameters for the key passed into require.
The permit method returns a copy of the parameters object, returning only the permitted keys and values. When creating a new Acti...
'System.Net.Http.HttpContent' does not contain a definition for 'ReadAsAsync' and no extension metho
...t made. The console app code does not compile. It gives me the compilation error:
6 Answers
...
Is there a “goto” statement in bash?
...s make it so that labels start like so : start: so that they aren't syntax errors.
– Alexej Magura
Apr 7 '17 at 18:03
5
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In PHP, what is a closure and why does it use the “use” identifier?
...
The as keyword in the use statement is giving me a syntax error in php 5.5: $closure = function ($value) use ($localVar as $alias) { //stuff}; Error given is: Parse: syntax error, unexpected 'as' (T_AS), expecting ',' or ')'
– Kal Zekdor
Jul 29...
How to change column order in a table using sql query in sql server 2005?
...en click save. This method actually drops and recreates the table, so some errors might occur.
If Change Tracking option is enabled for the database and the table, you shouldn't use this method.
If it is disabled, the Prevent saving changes that require the table re-creation option should be clear...
How do I import other TypeScript files?
...ire" code in either of them... also " import moo=module("moo"); " gives an error that the name moo does not exist in the current scope , highlighting the module("moo") part
– Roger Johansson
Oct 17 '12 at 9:27
...
Create thumbnail image
...ges generally. If you try to resize a PNG image like this, you'll get this error.
– HBlackorby
Jun 4 '15 at 21:45
Real...