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How to add to an existing hash in Ruby
...'
# This is then available immediately
hash[:b]
# => "Bee"
# The hash now contains both keys
hash
# => { :a => 'a', :b => 'Bee' }
Ruby on Rails confuses this somewhat by providing HashWithIndifferentAccess where it will convert freely between Symbol and String methods of addressing.
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What does glLoadIdentity() do in OpenGL?
... with all of the random functions that I have in my code. They work and I know when to use them, but I don't know why I need them or what they actually do.
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Cross-browser testing: All major browsers on ONE machine
...f using Sandboxie to run IE7 and IE8 in the same VM, thanks for the guide! Now I don't have to run three separate VMs just to test in IE6-IE8.
– Phil
Jan 8 '13 at 3:56
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how to check the dtype of a column in python pandas
...ent functions to treat numeric columns and string columns. What I am doing now is really dumb:
6 Answers
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Bootstrap dropdown sub menu missing
...Mark Otto..
"Submenus just don't have much of a place on the web right now, especially the mobile web. They will be removed with 3.0" - https://github.com/twbs/bootstrap/pull/6342
But, with a little extra CSS you can get the same functionality.
Bootstrap 4 (navbar submenu on hover)
.navbar-n...
When to use an interface instead of an abstract class and vice versa?
...hod" is that it's nearly always somewhat re-entrant - the "derived" class knows about not just the "abstract" method of its base class that it is implementing, but also about the public methods of the base class, even though most times it does not need to call them.
(Overly simplified) example:
ab...
Concrete Javascript Regex for Accented Characters (Diacritics)
...and E, but I left them out because only historians seem interested in them now, and the D and E sets don't even render correctly in my browser.
The original regex stopping at \u017F borked on the name "Șenol". According to FontSpace's Unicode Analyzer, that first character is \u0218, LATIN CAPITAL...
displayname attribute vs display attribute
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Good to know! Was about to implement a custom attribute to load the display value from the .resx file, then happened on this question. Display attribute is the way to go when developing localized applications.
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how to provide a swap function for my class?
...dummy
void swap(Bar& lhs, Bar& rhs) {
// ...
}
}
If swap is now used as shown in 1), your function will be found. Also, you may make that function a friend if you absolutely need to, or provide a member swap that is called by the free function:
// version 1
class Bar{
public:
frie...
What database does Google use?
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Do anyone know if it was that built from scratch or based on some product? I heard somewhere I don't remember where, that google used Oracle once, but they drop it because they need some modifications that Oracle won't do nor allow them...