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What does it mean when a CSS rule is grayed out in Chrome's element inspector?

I'm inspecting an h2 element on a web page using Google Chrome's element inspector and some of the CSS rules--which appear to be applied--are grayed out. It seems that a strike-through indicates that a rule was overridden, but what does it mean when a style is grayed out? ...
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Getting a list of associative array keys

... You can use: Object.keys(obj) Example: var dictionary = { "cats": [1, 2, 37, 38, 40, 32, 33, 35, 39, 36], "dogs": [4, 5, 6, 3, 2] }; // Get the keys var keys = Object.keys(dictionary); console.log(keys); See reference below...
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Selecting a row of pandas series/dataframe by integer index

...curious as to why df[2] is not supported, while df.ix[2] and df[2:3] both work. 6 Answers ...
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How do I reattach to a detached mosh session?

How do I reattach to a detached mosh session or otherwise get rid of 7 Answers 7 ...
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Can I read the hash portion of the URL on my server-side application (PHP, Ruby, Python, etc.)?

... The main problem is that the browser won't even send a request with a fragment part. The fragment part is resolved right there in the browser. So it's reachable through JavaScript. Anyway, you could parse a URL into bits, including the ...
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Is there an “exists” function for jQuery?

... In JavaScript, everything is 'truthy' or 'falsy', and for numbers 0 means false, everything else true. So you could write: if ($(selector).length) You don't need that >0 part. share | ...
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Returning the product of a list

... Without using lambda: from operator import mul reduce(mul, list, 1) it is better and faster. With python 2.7.5 from operator import mul import numpy as np import numexpr as ne # from functools import reduce # python3 compatibility a = ra...
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Are JavaScript strings immutable? Do I need a “string builder” in JavaScript?

Does javascript use immutable or mutable strings? Do I need a "string builder"? 10 Answers ...
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How can I check if a scrollbar is visible?

Is it possible to check the overflow:auto of a div? 19 Answers 19 ...
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Microsoft Excel mangles Diacritics in .csv files?

I am programmatically exporting data (using PHP 5.2) into a .csv test file. Example data: Numéro 1 (note the accented e). The data is utf-8 (no prepended BOM). ...