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How to check whether an object is a date?
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@Josiah Well, sure, removing all context there's a timestamp there: typeof Date.now() === "number", but: typeof new Date() === "object". More realistically, though, a date is a time and a location in space.
– Nick
Feb 18 at 20:04
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When to use a linked list over an array/array list?
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Linked lists are preferable over arrays when:
you need constant-time insertions/deletions from the list (such as in real-time computing where time predictability is absolutely critical)
you don't know how many items will be in the list. With arrays, you may need to re-declare and copy me...
How does grep run so fast?
...INES. Looking for newlines would slow grep down by a factor of
several times, because to find the newlines it would have to look at
every byte!
So instead of using line-oriented input, GNU grep reads raw data into
a large buffer, searches the buffer using Boyer-Moore, and only when
it...
How to check if a file exists in Documents folder?
...nd handle those errors gracefully than it is to try to figure out ahead of time whether the operation will succeed. For more information on file system race conditions, see “Race Conditions and Secure File Operations” in Secure Coding Guide.
Source: Apple Developer API Reference
From the secure...
Wait until file is unlocked in .NET
...rceFile, myDestFile));
You can also define the retry count, and the wait time between retries.
NOTE: Unfortunately, the underlying Win32 error (ERROR_SHARING_VIOLATION) is not exposed with .NET, so I have added a small hack function (IsSharingViolation) based on reflection mechanisms to check thi...
animating addClass/removeClass with jQuery
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addClass, removeClass and toggleClass also accepts a second argument; the time duration to go from one state to the other.
$(this).addClass('abc',1000);
See jsfiddle:- http://jsfiddle.net/6hvZT/1/
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How do I do a case-insensitive string comparison?
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@abarnert Indeed, depending on context - sometimes it's better to leave the source intact but upfront normalization can also make later code much simpler.
– Veedrac
May 1 '15 at 12:13
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Why does the order of the loops affect performance when iterating over a 2D array?
...ed the i and j variables around. They both run in different amounts of time. Could someone explain why this happens?
7 ...
What are the mechanics of short string optimization in libc++?
...a different setting of _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT will create run time errors.
I recommend this flag only be changed by a vendor of libc++.
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When should you NOT use a Rules Engine? [closed]
...ll change often as users identify new requirements but will stabilize over time. Do not use rules as an alternative to code deploy.
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