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How to center a (background) image within a div?

... If you want the entire div to be filled with the image and no extra space you should use background-size: cover; If you want the entire image to show without any part of the image being cut off or stretched you want to use background-size: contain; – Zlerp...
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Creating PHP class instance with a string

I have two classes, class ClassOne { } and class ClassTwo {} . I am getting a string which can be either "One" or "Two" . ...
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Pair/tuple data type in Go

... There is no tuple type in Go, and you are correct, the multiple values returned by functions do not represent a first-class object. Nick's answer shows how you can do something similar that handles arbitrary types using interface{}. (I might have used an...
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Unique random string generation

I'd like to generate random unique strings like the ones being generated by MSDN library.( Error Object ), for example. A string like 't9zk6eay' should be generated. ...
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Different ways of clearing lists

... Why the first one will only affect a? I thought a and b reference to the same object... Just wanna know why. Thanks. – Alston Nov 22 '14 at 9:48 ...
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How to enumerate a range of numbers starting at 1

...o do in Python 2.6 or newer: enumerate(range(2000, 2005), 1) Python 2.5 and older do not support the start parameter so instead you could create two range objects and zip them: r = xrange(2000, 2005) r2 = xrange(1, len(r) + 1) h = zip(r2, r) print h Result: [(1, 2000), (2, 2001), (3, 2002), ...
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How do I create an immutable Class?

...rayList.ReadOnly or similar - you can combine this with the previous point and store a read-only copy to be returned when callers access it), return an enumerator, or use some other method/property that allows read-only access into the collection keep in mind that you still may have the appearance o...
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Regex lookahead, lookbehind and atomic groups

...hat I can use them for. Does somebody have examples so I can try to understand how they work? 3 Answers ...
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Chrome ignores autocomplete=“off”

...erience, Chrome only autocompletes the first <input type="password"> and the previous <input>. So I've added: <input style="display:none"> <input type="password" style="display:none"> To the top of the <form> and the case was resolved. ...
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Window Height=“Auto” not working as expected

... Set the window's property SizeToContent="WidthAndHeight". This should help. share | improve this answer | follow | ...