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Ruby on Rails: How do I add placeholder text to a f.text_field?
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In Rails 4(Using HAML):
=f.text_field :first_name, class: 'form-control', autofocus: true, placeholder: 'First Name'
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How do I interactively unstage a particular hunk in git?
...the opposite of git add --patch, according to the documentation. The short form -p also works for both commands.
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HTML 5: Is it , , or ?
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Simply <br> is sufficient.
The other forms are there for compatibility with XHTML; to make it possible to write the same code as XHTML, and have it also work as HTML. Some systems that generate HTML may be based on XML generators, and thus do not have the abilit...
Return two and more values from a method
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You should use code formatting, not text formatting. Indent lines four spaces and the weirdness caused by irb's >> prompt will go away.
– Chris Lutz
Dec 25 '09 at 15:31
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What is the difference between Normalize.css and Reset CSS?
...like: display settings for HTML5 elements, the lack of font inheritance by form elements, correcting font-size rendering for pre, SVG overflow in IE9, and the button styling bug in iOS.
Normalize.css doesn't clutter your dev tools. A common irritation when using reset.css is the large inheritance ch...
Never seen before C++ for loop
... b[u] = v;
v = p[v];
}
You might consider refactoring to the while() format as you translate to C#. In my opinion it is clearer, less of a trap for new programmers, and equally efficient.
As others have pointed out -- but to make my answer complete -- to make it work in C# you would need to c...
What is the real overhead of try/catch in C#?
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Three points to make here:
Firstly, there is little or NO performance penalty in actually having try-catch blocks in your code. This should not be a consideration when trying to avoid having them in your application. The performance hit only comes into play when an exception is thrown....
Real life example, when to use OUTER / CROSS APPLY in SQL
...I've used both of these approaches (ROW OVER and CROSS APPLY) with both performing well in various scenarios, but I've never understood why they perform differently. That article was sent from the heavens!! The focus on proper indexing matching the order by directions helped in a big way for queri...
What is the difference between linear regression and logistic regression?
...hours, etc.
Equation
Linear regression gives an equation which is of the form Y = mX + C,
means equation with degree 1.
However, logistic regression gives an equation which is of the form
Y = eX + e-X
Coefficient interpretation
In linear regression, the coefficient interpretation of independen...