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grepping using the “|” alternative operator
...Still, I'd delete an answer that is identical to the upvoted answer. Especially if had were 40k reputation under my belt.
– Attila Csipak
Sep 4 at 13:29
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SecItemAdd and SecItemCopyMatching returns error code -34018 (errSecMissingEntitlement)
...chain Groups+Turn On
An answer here, from Apple:
UPDATE: We have finally been able to reproduce the -34018 error on iOS
8.3. This is the first step in identifying the root cause and then coming up with a fix.
As usual, we can't commit to a release timeframe, but this has
affected man...
Proper use of 'yield return'
...must have the complete list before returning.
By using yield-return, you really only need to have the next item before returning.
Among other things, this helps spread the computational cost of complex calculations over a larger time-frame. For example, if the list is hooked up to a GUI and the us...
Elegant way to check for missing packages and install them?
...em are novice/intermediate R users and don't realize that they have to install packages they don't already have.
29 Answers...
What is the “right” JSON date format?
...logy
It conforms to ISO 8601
ISO 8601 has been well-established internationally for more than a decade
ISO 8601 is endorsed by W3C, RFC3339, and XKCD
That being said, every date library ever written can understand "milliseconds since 1970". So for easy portability, ThiefMaster is right.
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Find kth smallest element in a binary search tree in Optimum way
I need to find the kth smallest element in the binary search tree without using any static/global variable. How to achieve it efficiently?
The solution that I have in my mind is doing the operation in O(n), the worst case since I am planning to do an inorder traversal of the entire tree. But deep do...
What is a “Bitmap heap scan” in a query plan?
... stay in memory, but you get the point).
A bitmap index scan will sequentially open a short-list of disk pages, and grab every applicable row in each one (hence the so-called recheck cond you see in query plans).
Note, as an aside, how clustering/row order affects the associated costs with either ...
How to affect other elements when one element is hovered
...e source where I can find more information about that ? Is it supported by all browser, is it CSS3 ? Would be great to have some more info about that. Thanks so much!
– Anonymous
Oct 19 '11 at 10:35
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Searching if value exists in a list of objects using Linq
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Because not all collections have Exists, and it does not take a lambda expression, but rather the object we are looking for itself.
– zvolkov
Jul 9 '14 at 12:10
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Checking if a key exists in a JavaScript object?
... testing whether a key exists. What if the key exists but the value is actually undefined?
var obj = { key: undefined };
obj["key"] !== undefined // false, but the key exists!
You should instead use the in operator:
"key" in obj // true, regardless of the actual value
If you want to check if a...