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What is the PostgreSQL equivalent for ISNULL()
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The best answer for the question, of course. This expression is the full equivalent of ISNULL(). COALESCE() is very smart and interesting to know but it cannot perform an ISNULL() while it is closed.
– Skrol...
Guards vs. if-then-else vs. cases in Haskell
...out style for explicitly recursive functions, but I would suggest that the best style is finding a way to reuse existing recursive functions instead.
nthElement xs n = guard (n > 0) >> listToMaybe (drop (n-1) xs)
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Inversion of Control vs Dependency Injection
...we get NullPointerException: bean does not exist. Constructor injection is Best practice to inject dependencies.
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How to get the anchor from the URL using jQuery?
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what's the best way of keeping track of changes of this, ie. somebody clicked an inner-page link?
– Rid Iculous
May 10 '16 at 4:26
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How to sort a Ruby Hash by number value?
... not sort by string value... You should reverse a1 and a2 in your example
Best way in any case (as per Mladen) is:
metrics = {"sitea.com" => 745, "siteb.com" => 9, "sitec.com" => 10 }
metrics.sort_by {|_key, value| value}
# ==> [["siteb.com", 9], ["sitec.com", 10], ["sitea.com", 745]...
Using fonts with Rails asset pipeline
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I think this is the best solution; unless you authored the fonts they probably belong in /vendor/assets/fonts -- not /app/assets/fonts. This approach solves for both, the above does not
– Casey
Aug 19 '13 a...
Converting a double to an int in C#
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Your link actually explains it best, and its not as simple as round vs truncate: Type: System.Int32 value, rounded to the nearest 32-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted t...
How are the points in CSS specificity calculated
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Pekka's answer is practically correct, and probably the best way to think about the issue.
However, as many have already pointed out, the W3C CSS recommendation states that "Concatenating the three numbers a-b-c (in a number system with a large base) gives the specificity." So th...
How to validate an email address in JavaScript
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Using regular expressions is probably the best way. You can see a bunch of tests here (taken from chromium)
function validateEmail(email) {
const re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,...
Limit file format when using ?
...h MIME-types and corresponding extensions in the accept attribute. So, the best approach is:
<!-- Right approach: Use both file extensions and corresponding MIME-types. -->
<!-- (IE 10+, Edge (EdgeHTML), Edge (Chromium), Chrome, Firefox) -->
<input type="file"
accept=".xls,.xlsx,...