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Using Linq to get the last N elements of a collection?
....Skip(Math.Max(0, collection.Count() - N));
This approach preserves item order without a dependency on any sorting, and has broad compatibility across several LINQ providers.
It is important to take care not to call Skip with a negative number. Some providers, such as the Entity Framework, will p...
How to disable HTML links
...al" function (for example using knockoutjs) In that case the event handler ordering can cause some troubles. Hence I implemented disabled links by binding a return false handler to the link's touchstart, mousedown and keydown events. It has some drawbacks (it will prevent touch scrolling started on ...
How to move an iFrame in the DOM without losing its state?
...The basic idea is to create a flex-box wrapper and then define an specific order for the iframes using the order attribute on each iframe wrapper.
<style>
.container{
display: flex;
flex-direction: column;
}
</style>
<div class="container">
<div id="wrap1" style="...
What is a memory fence?
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For performance gains modern CPUs often execute instructions out of order to make maximum use of the available silicon (including memory read/writes). Because the hardware enforces instructions integrity you never notice this in a single thread of execution. However for multiple threads or en...
How does the socket API accept() function work?
.... This was done to improve per-packet performance: computers were several orders of magnitude slower in those days.
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Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
...use), not by record number. Discussions are
increasingly infinite-scroll ordered by date (again allowing index
use), not by paginated by post number. And so on.
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Shuffle an array with python, randomize array item order with python
What's the easiest way to shuffle an array with python?
11 Answers
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How to delete an item in a list if it exists?
...ing)
The removemethod will remove only the first occurrence of thing, in order to remove all occurrences you can use while instead of if.
while thing in some_list: some_list.remove(thing)
Simple enough, probably my choice.for small lists (can't resist one-liners)
2) Duck-typed, EAFP styl...
Is there a way to 'uniq' by column?
...sort's manpage says: "-u, --unique with -c, check for strict ordering; without -c, output only the first of an equal run." So, it is indeed "the first occurrence of the duplicate before sorting."
– Geremia
Apr 15 '16 at 17:32
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UTF-8: General? Bin? Unicode?
...e_ci treats (I think) all Emoji as equal. utf8mb4_unicode_520_ci gives an ordering to Emoji.
– Rick James
Jul 19 '19 at 16:18
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