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How to drop rows of Pandas DataFrame whose value in a certain column is NaN
...ta, including dropna(), is built into pandas explicitly. Aside from potentially improved performance over doing it manually, these functions also come with a variety of options which may be useful.
In [24]: df = pd.DataFrame(np.random.randn(10,3))
In [25]: df.iloc[::2,0] = np.nan; df.iloc[::4,1] ...
Can someone explain the “debounce” function in Javascript
...turned function will be able to reference this due to closure.
// Each call to the returned function will share this common timer.
var timeout;
// Calling debounce returns a new anonymous function
return function() {
// reference the context and args for the setTimeout function
...
API Versioning for Rails Routes
...Bo Jeanes for the prompting on those things.
You might want to wear a really strong helmet because this is going to blow your mind.
The Rails 3 routing API is super wicked. To write the routes for your API, as per your requirements above, you need just this:
namespace :api do
namespace :v1 d...
inject bean reference into a Quartz job in Spring?
... I do not use Spring's Quartz jobs, because I need to schedule them dynamically, at run time, and all examples of integrating Spring with Quartz that i found were hard-coding the shcedules in the Spring config files... Anyway, here is how I schedule the job:
...
How to get the list of all printers in computer
I need to get the list of all printers that connect to computer?
6 Answers
6
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What Process is using all of my disk IO
If I use "top" I can see what CPU is busy and what process is using all of my CPU.
7 Answers
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Difference between outline and border
...
FIDDLE
(NB: Although firefox has the -moz-outline-radius property which allows rounded corners on outline... this property it is not defined in any CSS standard, and is not supported by other browsers (source))
2) Styling one side only
border has properties to style each side with border-top:, ...
Scrolling a flexbox with overflowing content
... They work when the parent's height doesn't depend on its children, generally, which is the case here. min-height: 100% does indeed fix your stretch-even-when-columns-are-short issue in Firefox (though not in Chrome). Not sure offhand if that's a Chrome bug or a Firefox bug.
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Proper SCSS Asset Structure in Rails
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The problem with CSS is, you do not want to automatically add all files.
The order of which your sheets are loaded and processed by the browser is essential. So you will always end up explicitly importing all your css.
As an example, lets say you have a normalize.css sheet, t...
When to use static vs instantiated classes
...r BB code to HTML ; it doesn't have a life on its own)
(Yeah, I admit, really really overly-simplified...)
One thing about static methods/classes is that they don't facilitate unit testing (at least in PHP, but probably in other languages too).
Another thing about static data is that only one in...