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Why is there a difference in checking null against a value in VB.NET and C#?
... Why answer the question by trial and error? Should be possible to do it from the language specifications.
– David Heffernan
Mar 20 '13 at 12:59
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What is the most efficient way to create HTML elements using jQuery?
...ascript engines and weigh your audience with the results. Make a decision from there.
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How to drop rows of Pandas DataFrame whose value in a certain column is NaN
...e missing data, 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....
What do < and > stand for?
... and "Right Tag", but maybe RT was taken by Return, so it's using letter G from right instead of R...
– jeffkee
Oct 30 '19 at 23:34
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How do I remove the Devise route to sign up?
...d to do this as well, but a thread on the devise google group dissuaded me from searching for a really clean solution.
I'll quote José Valim (the Devise maintainer) :
There isn't a straight-forward option. You can either provide a patch
or use :skip => :registerable and add only the route...
What does the construct x = x || y mean?
...it is often considered a bad programming practice, because it prevents you from passing a falsey value (which is not necessarily undefined or null) as a parameter. Consider following example:
function badFunction(/* boolean */flagA) {
flagA = flagA || true;
console.log("flagA is set to " + (fla...
What is a plain English explanation of “Big O” notation?
...hat we could express the number of operations as: n2 + 2n. But as you saw from our example with two numbers of a million digits apiece, the second term (2n) becomes insignificant (accounting for 0.0002% of the total operations by that stage).
One can notice that we've assumed the worst case scenari...
Best way for a 'forgot password' implementation? [closed]
...the link in the email, he is moved to your page. The page retrieves the ID from the URL, hashes it again, and checks against the table. If such a record is there and is no more than, say, 24 hours old, the user is presented with the prompt to enter a new password.
The user enters a new password, hit...
The most accurate way to check JS object's type?
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|| (cache[key] = key.slice(8, -1).toLowerCase()); // get XXXX from [object XXXX], and cache it
};
}(this));
use as:
type(function(){}); // -> "function"
type([1, 2, 3]); // -> "array"
type(new Date()); // -> "date"
type({}); // -> "object"
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How to install ia32-libs in Ubuntu 14.04 LTS (Trusty Tahr)
...4.7-dev:i386 is required to extract the Internet Explorer virtual machines from www.modern.ie
– Tek
Aug 7 '14 at 20:39
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