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Best way to implement Enums with Core Data
...! so much easier than creating tables in the db, unless your db is filled from a web service then its probably best to use a db table!
– TheLearner
Oct 4 '11 at 8:33
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Change a Django form field to a hidden field
...oes without saying, but you'll need to import forms before this will work. from django import forms
– teewuane
Jul 30 '14 at 22:18
2
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How does the bitwise complement operator (~ tilde) work?
...peration is a complement, not a negation.
Consider that ~0 = -1, and work from there.
The algorithm for negation is, "complement, increment".
Did you know? There is also "one's complement" where the inverse numbers are symmetrical, and it has both a 0 and a -0.
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Count the number occurrences of a character in a string
...lest, but if you're doing this frequently, check out collections.Counter:
from collections import Counter
my_str = "Mary had a little lamb"
counter = Counter(my_str)
print counter['a']
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Creating hard and soft links using PowerShell
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You can call the mklink provided by cmd, from PowerShell to make symbolic links:
cmd /c mklink c:\path\to\symlink c:\target\file
You must pass /d to mklink if the target is a directory.
cmd /c mklink /d c:\path\to\symlink c:\target\directory
For hard links, I ...
Cannot push to Heroku because key fingerprint
...to fix my second account, it would not take until I removed my default key from the first account. SSH-AGENT will send the first key by default, causing this problem. The fix is to create specific keys for heroku (not the default) for each account
– Tom Carchrae
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Difference between the Facade, Proxy, Adapter and Decorator design patterns? [closed]
...nslates your calls as required.) You are solving the problem of the client from having to manage a heavy and/or complex object.
Decorator is used to add more gunpowder to your objects (note the term objects -- you typically decorate objects dynamically at runtime). You do not hide/impair the existi...
Representing Monetary Values in Java [closed]
...e timeandmoney, and whilst I applaud them for trying to prevent developers from having to reinvent the wheel, I just don't have enough confidence in a pre-alpha library to use it in a production environment. Besides, if you dig around under the hood, you'll see they use BigDecimal too.
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What does the Ellipsis object do?
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This came up in another question recently. I'll elaborate on my answer from there:
Ellipsis is an object that can appear in slice notation. For example:
myList[1:2, ..., 0]
Its interpretation is purely up to whatever implements the __getitem__ function and sees Ellipsis objects there, but i...
Difference between Lookup() and Dictionary(Of list())
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@nawfal - that's exactly what Lookups are for. From msdn: "You can create an instance of a Lookup<TKey, TElement> by calling ToLookup on an object that implements IEnumerable<T>."
– Niall Connaughton
Aug 26 '15 at 6:06
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