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MongoDB/Mongoose querying at a specific date?
...nces are that the dates you saved were new Date(), which includes the time components. To query those times you need to create a date range that includes all moments in a day.
db.posts.find( //query today up to tonight
{"created_on": {"$gte": new Date(2012, 7, 14), "$lt": new Date(2012, 7, 15)}})...
What is the reason behind cbegin/cend?
...onst int &. If it takes it's parameters as int &, C++ will issue a compiler error.
C++17 has a more elegant solution to this problem: std::as_const. Well, at least it's elegant when using range-based for:
for(auto &item : std::as_const(vec))
This simply returns a const& to the ...
Append value to empty vector in R?
... "R is slow", or "R loops should be avoided".
As BrodieG mentioned in the comments: it is much better to pre-allocate a vector of the desired length, then set the element values in the loop.
Here are several ways to append values to a vector. All of them are discouraged.
Appending to a vector ...
Determine if a String is an Integer in Java [duplicate]
...fective Java item 57: Use exceptions only for exceptional conditions." His comment on using exceptions to iterate over an array is // Horrible abuse of exceptions. Don't ever do this! actually
– corsiKa
Mar 3 '15 at 17:53
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Overriding superclass property with different type in Swift
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Sorry just deleted my comment and then saw your reply. I was having a problem because in my real case my superclass is an Objective-C class with a strong property and I was getting an error trying to override it - but it seems I missed that it tra...
What is LDAP used for?
...ion for each entry. The add/delete/update performance is relatively slower compared with read/query because the assumption is that you don’t do “update” that often.
Imagine you have a website that has a million registered users with thousands of page requests per second. Without LDAP, every...
Bring a window to the front in WPF
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Activate does not work on Windows XP sometimes. I recommend @Matthew Xavier 's answer.
– Lex Li
Sep 18 '10 at 5:47
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M_PI works with math.h but not with cmath in Visual Studio
...re you will have to have it after the #include "stdafx.h") and suddenly it compile perfectly.
Try moving it higher up the page. Totally unsure as to why this would cause issues though.
Edit: Figured it out. The #include <math.h> occurs within cmath's header guards. This means that somethin...
Best way to iterate through a Perl array
...be used? If so, sounds like one shouldn't use that approach. stackoverflow.com/questions/6440723/… rt.cpan.org/Public/Bug/Display.html?id=115863
– Thorsten Schöning
Jan 14 '19 at 11:40
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Center image horizontally within a div
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