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Ruby optional parameters

...s = nil) scope ||= LDAP::LDAP_SCOPE_SUBTREE ... do something ... end Now if you call the method as above, the behaviour will be as you expect. share | improve this answer | ...
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“Unknown provider: aProvider

... I'd still love to know how I could have found the place in our source code that caused this issue, but I have since been able to find the problem manually. There was a controller function declared on the global scope, instead of using a .contr...
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How to delete duplicates on a MySQL table?

...y SELECT * FROM table GROUP BY title, SID; It all depends on how well you know what you are doing. – Kamil Szot Aug 24 '15 at 10:22 1 ...
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Date ticks and rotation in matplotlib

... import numpy as np import matplotlib.pyplot as plt import datetime as dt now = dt.datetime.now() hours = [now + dt.timedelta(minutes=x) for x in range(0,24*60,10)] days = [now + dt.timedelta(days=x) for x in np.arange(0,30,1/4.)] hours_value = np.random.random(len(hours)) days_value = np.random.ra...
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Git stash: “Cannot apply to a dirty working tree, please stage your changes”

... words, make a commit (which we will never push) of your current changes. Now that your workspace is clean, pop your stash. Now, commit the stash changes as an amendment to your previous commit. Having done that you now have both sets of changes combined in a single commit ("Fixme"); just reset (...
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Convert UTC to local time in Rails 3

...rake -D time So, to convert to EST, catering for DST automatically: Time.now.in_time_zone("Eastern Time (US & Canada)") share | improve this answer | follow ...
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CSS horizontal centering of a fixed div?

I know this question is a million times out there, however I can't find a solution to my case. I've got a div, which should be fixed on the screen, even if the page is scrolled it should always stay CENTERED in the middle of the screen! ...
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Why do we check up to the square root of a prime number to determine if it is prime?

... is not a prime, it can be factored into two factors a and b: n = a * b Now a and b can't be both greater than the square root of n, since then the product a * b would be greater than sqrt(n) * sqrt(n) = n. So in any factorization of n, at least one of the factors must be smaller than the square ...
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Intellij IDEA crashed, and now throws an error

... In idea 13, the "cache" directory is now "caches" - removing everything in there still works. – Yann Nov 6 '15 at 14:35 ...
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.NET obfuscation tools/strategy [closed]

...ly, to IL, to C# code and have it compiled again with very little effort. Now with .Net 3.5 I'm not at all sure. Try decompiling a 3.5 assembly; what you get is a long long way from compiling. Add the optimisations from 3.5 (far better than 1.1) and the way anonymous types, delegates and so on ar...