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Is R's apply family more than syntactic sugar?
...me(z <- lapply(y, foo))
# user system elapsed
# 2.89 0.00 2.91
system.time(z <- vapply(y, foo, numeric(1)))
# user system elapsed
# 1.35 0.00 1.36
Jan. 1, 2020 update:
system.time({z1 <- numeric(1e6); for(i in seq_along(y)) z1[i] <- foo(y[i])})
# user syst...
What is the most efficient/elegant way to parse a flat table into a tree?
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Leniel Maccaferri
91.3k4040 gold badges331331 silver badges445445 bronze badges
answered Dec 22 '10 at 4:31
bobobobobob...
What's the difference between UTF-8 and UTF-8 without BOM?
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91
Here are examples of the BOM usage that actually cause real problems and yet many people don't ...
Is XSLT worth it? [closed]
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91
So much negativity!
I've been using XSLT for a good few years now, and genuinely love it. The ...
How come a non-const reference cannot bind to a temporary object?
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Tony DelroyTony Delroy
91k1010 gold badges149149 silver badges219219 bronze badges
...
How does a public key verify a signature?
...d 7ed2 088d 9675 801c fb9b 4f95 1...~....u....O.
00000010: c936 8cd0 0cc4 9159 33c4 9625 d752 5b77 .6.....Y3..%.R[w
00000020: 5bfc 988d 19fe d790 b633 191f 50cf 1bf7 [........3..P...
00000030: 34c0 7788 efa2 4967 848f 99e2 a442 91b9 4.w...Ig.....B..
00000040: 5fc7 6c79 40ea d0bc 6cd4 3c9a 488e 9...
What is the difference between “JPG” / “JPEG” / “PNG” / “BMP” / “GIF” / “TIFF” Image?
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91
Yes. They are different file formats (and their file extensions).
Wikipedia entries for each o...
How can you encode a string to Base64 in JavaScript?
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919
You can use btoa() and atob() to convert to and from base64 encoding.
There appears to be som...
How do I find the duplicates in a list and create another list with them?
...-mtimeit -s 'import test' 'test.moooeeeep(test.l)'
10000 loops, best of 3: 91.3 usec per loop
$ python -mtimeit -s 'import test' 'test.thg435(test.l)'
1000 loops, best of 3: 266 usec per loop
$ python -mtimeit -s 'import test' 'test.RiteshKumar(test.l)'
100 loops, best of 3: 8.35 msec per loop
Int...
How to fix Git error: object file is empty?
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91
Excellent answer, together with all the steps and all. I suppose you saved me from googling each and every one of those!
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