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foldl versus foldr behavior with infinite lists
...foldl can, plus more. This is true! In fact, foldl is nearly useless!
But what if we want to produce a non-lazy result by folding over a large (but not infinite) list? For this, we want a strict fold, which the standard libraries thoughfully provide:
foldl' is:
Left associative: f ( ... (f (f (f...
push multiple elements to array
...st. It will create a new one. I know it is similar. The spread operator is what I was looking for. Just look at the other answers and comments there for details.
– BluE
Feb 27 at 7:55
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How to delete multiple values from a vector?
... not match, but I'd include it for the sake of readability.
This is, btw., what setdiff does internally (but without the unique to throw away duplicates in a which are not in remove).
If remove contains incomparables, you'll have to check for them individually, e.g.
if (any (is.na (remove)))
a &...
How to 'bulk update' with Django?
... I tried django-bulk-update, and I personally discourage using it. What it does internally is to create a single SQL statement which looks like this: UPDATE "table" SET "field" = CASE "id" WHEN %s THEN %s WHEN %s THEN %s [...] WHERE id in (%s, %s, [...]);. This is kind of all right for few r...
What is the difference between children and childNodes in JavaScript?
...pt and I ran across childNodes and children properties. I am wondering what the difference between them is. Also is one preferred to the other?
...
How to select date from datetime column?
...try this:
WHERE datetime LIKE '2009-10-20%'
See this answer for info on the performance implications of using LIKE.
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How to concatenate two numbers in javascript?
...doing some math programming and needed to concatenate two numbers.
So the what if I needed to combine two numbers 17 and 29. Sure I can turn them into strings and concatenate them then turn the new string back into a number. That seems to work pretty well and I can go on with my code, but lets take...
What is the zero for string?
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Converting pfx to pem using openssl
...ovided the detail on how to merge the cert and key into one pem file, just what I needed.
– ebt
Dec 8 '14 at 16:33
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What is the Objective-C equivalent for “toString()”, for use with NSLog?
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