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Laravel Eloquent Sum of relation's column
I've been working on a shoppingcart application and now I've come to the following issue..
4 Answers
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How do I check if a Sql server string is null or empty
...ffer_Text == '')
temp := null;
else
temp := listing.Offer_Text; // may now be null or non-null, but not ''
// b) ISNULL:
if (temp is null)
result := true;
else
result := false;
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impr...
What is :: (double colon) in Python when subscripting sequences?
I know that I can use something like string[3:4] to get a substring in Python, but what does the 3 mean in somesequence[::3] ?
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Fast stable sorting algorithm implementation in javascript
... stable sort.
I've written an article about it on my blog if you want to know more about this technique and how to implement it: http://blog.vjeux.com/2010/javascript/javascript-sorting-table.html
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Import regular CSS file in SCSS file?
...st use a different tool to import your CSS files, it's easier and it works now. I use gulp-import-css, I'm not sure what's the Grunt equivalent.
– fregante
May 18 '14 at 2:32
3
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How can I be notified when an element is added to the page?
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Warning!
This answer is now outdated. DOM Level 4 introduced MutationObserver, providing an effective replacement for the deprecated mutation events. See this answer for a better solution than the one presented here. Seriously. Don't poll the DOM ev...
Send a pull request on GitHub for only latest commit
.... The pull request UI on github.com shows the last 9 commits and I don't know how to filter that down.
7 Answers
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Maximum single-sell profit
...pective max and min.
If we use this approach, our recurrence relation is now
T(1) <= O(1)
T(n) <= 2T(n / 2) + O(1)
Using the Master Theorem here gives us a runtime of O(n) with O(lg n) space, which is even better than our original solution!
But wait a minute - we can do even better than ...
Why does (0 < 5 < 3) return true?
... editing my question to add the if(0 < 5 < 1) == false. All is clear now, thanks :)
– punkrockbuddyholly
Nov 3 '10 at 16:39
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Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?
... evicted) than there is no problem with cache misses with matice2 either.
Now to go deeper in how caches works, if byte address of your variable is X, than the cache line for it would be (X >> 6) & (L - 1). Where L is total number of cache lines in your cache. L is always power of 2.
The...