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How to get the last N records in mongodb?
...een documented this. By default, the find() operation will get the records from beginning. How can I get the last N records in mongodb?
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What is the difference between typeof and instanceof and when should one be used vs. the other?
..."function" object and instanceof will fail if you try to compare an object from another (i)frame/window. typeof will work in all cases since it returns the string "function".
– some
May 23 '09 at 16:56
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Stop all active ajax requests in jQuery
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The variable has to be declared global to access it from another function when an ajax call is in progress. example: a multi-file upload process.
– Clain Dsilva
Oct 3 '18 at 14:57
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Traits vs. interfaces
...he concept of horizontal code reuse and not wanting to necessarily inherit from an abstract class. What I don't understand is: What is the crucial difference between using traits versus interfaces?
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Git: Recover deleted (remote) branch
...d to run into the problem again (or unintentionally clobber commits pushed from other repos).
– Chris Johnsen
Jan 3 '10 at 5:27
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String, StringBuffer, and StringBuilder
...nd operations in the construction of the string) and will only be accessed from a single thread, using a StringBuilder is good enough.
If your string can change, and will be accessed from multiple threads, use a StringBuffer because StringBuffer is synchronous so you have thread-safety.
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How do I clear only a few specific objects from the workspace?
I would like to remove some data from the workspace. I know the "Clear All" button will remove all data. However, I would like to remove just certain data.
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How to download a file from a URL in C#?
What is a simple way of downloading a file from a URL path?
11 Answers
11
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How do I implement basic “Long Polling”?
...;
<div id="messages">
<div>
<span class="from">First!:</span>
<span class="msg">Welcome to chat. Please don't hurt each other.</span>
</div>
</div>
<form method="post" action="#">
<div>Nick: &...
Pimpl idiom vs Pure virtual class interface
...r always depends on requirements. Third party Library writers (as distinct from using a library in your own organization) may heavily prefer the Pimpl.
– Spacen Jasset
Nov 10 '18 at 17:38
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