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Why is pow(a, d, n) so much faster than a**d % n?
...into the future". Note, though, that the optimization could be extremely difficult or even impossible in general. For constant operands it could be optimized, but in x ** y % n, x could be an object that implements __pow__ and, based on a random number, returns one of several different objects imp...
Deleting DataFrame row in Pandas based on column value
...
how to do that if we don't know the column name?
– Piyush S. Wanare
Jul 3 '18 at 13:20
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Converting camel case to underscore case in ruby
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If you change tr("-","_") to tr("- ","_") (space added to first param), this will also turn spaces into underscores. Also, I don't think you even need to include self., or at least it works for me under Ruby 1.9.3.
...
How do you loop through currently loaded assemblies?
...t a "diagnostics" page in my ASP.NET application which does things like verify the database connection(s), display the current appSettings and ConnectionStrings, etc. A section of this page displays the Assembly versions of important types used throughout, but I could not figure out how to effectiv...
Why does Go have a “goto” statement
... the math/gamma.go file, the goto statement is used:
for x < 0 {
if x > -1e-09 {
goto small
}
z = z / x
x = x + 1
}
for x < 2 {
if x < 1e-09 {
goto small
}
z = z / x
x = x + 1
}
if x == 2 {
return z
}
x = x - 2
p = (((((x...
Can I zip more than two lists together in Scala?
...s of arbitrary size, but the transpose function does exactly what you need if you don't mind getting a list of lists instead.
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How to merge two arrays in JavaScript and de-duplicate items
...ternet Explorer Technical Preview.
But if you use Babel, you can have it now.
const input = [
[1, 2, 3],
[101, 2, 1, 10],
[2, 1]
];
const mergeDedupe = (arr) => {
return [...new Set([].concat(...arr))];
}
console.log('output', mergeDedupe(input));
...
Link to “pin it” on pinterest without generating a button
...error when trying to pin: Parameter 'method' (value link) is not one of unknown, uploaded, scraped, bookmarklet, email, iphone, button, ipad, android, android_tablet, api_sdk, extension, api_other, bad.. The solution is to keep the url as button but ignore the pinterest script. see stackoverflow.com...
How do I partially update an object in MongoDB so the new object will overlay / merge with the exist
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If I understand the question correctly, you want to update a document with the contents of another document, but only the fields that are not already present, and completely ignore the fields that are already set (even if to ...
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setcookie('remember_user', null, -1, '/');
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