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What is the difference between bottom-up and top-down?
...assume that you have already computed all subproblems and that you have no idea what the optimal evaluation order is. Typically, you would perform a recursive call (or some iterative equivalent) from the root, and either hope you will get close to the optimal evaluation order, or obtain a proof that...
Is Safari on iOS 6 caching $.ajax results?
.....who knew. But no other browser maker has ever thought it would be a good idea until now. But that does NOT account for the caching when no Cache-Control or Expires headers are set, only when there are some set. So it must be a bug.
Below is what I use in the right bit of my Apache config to targe...
Check if a string contains an element from a list (of strings)
...Contains( startPath );
EDIT: This would be even faster using the HashSet idea @Marc Gravell mentions since you could change Contains to ContainsKey and the lookup would be O(1) instead of O(N). You would have to make sure that the paths match exactly. Note that this is not a general solution as ...
Get top n records for each group of grouped results
...as able to delete JOIN (SELECT @prev := NULL, @rn := 0) AS vars. I get the idea is to declare empty variables, but it seems extraneous for MySql.
– Joseph Cho
Jun 6 '18 at 18:42
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Can I store the .git folder outside the files I want tracked?
I have an unusual idea to use git as a backup system. So let's say I have a directory ./backup/myfiles and I want to back that up using git. To keep things clean I don't want to have a .git directory in the myfiles folder, so I thought I could create ./backup/git_repos/myfiles. From looking at the g...
How can I create download link in HTML?
I have a basic idea of HTML. I want to create the download link in my sample website, but I don't have idea of how to create it. How do I make a link to download a file rather than visit it?
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Smallest data URI image possible for a transparent image
... there any arguments against using an SVG? Any cases where it's not a good idea?
– tremby
Jun 28 '17 at 21:19
An SVG i...
Redirecting from HTTP to HTTPS with PHP
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$_SERVER['HTTPS'] is not always set, but it is a good idea to check before. Thats why I recommend to do it with an useful rewrite rule in Apache, which only redirects when its not on HTTPS.
– powtac
Feb 24 '11 at 15:03
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How do I use Maven through a proxy?
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cant find setting.xml file in the m2 directory. any idea why? @Rich Seller
– Ariox66
Jul 18 '15 at 16:18
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Interface or an Abstract Class: which one to use?
... be extended. I personally don't like the abstract implements an interface idea because it contributes to code obfuscation and is less direct, IMO.
– Prefix
Oct 29 '14 at 15:23
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