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How can I find the length of a number?
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Ok, so many answers, but this is a pure math one, just for the fun or for remembering that Math...
Creating temporary files in Android
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MacarseMacarse
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What does “error: option --single-version-externally-managed not recognized” indicate?
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New Update:
Install the latest version of setuptools. If you still get the error, install whee...
得合伙人者得天下：腾讯五虎、新东方三驾马车、携程四君子、复旦五虎 - 资...
...到争执的话很容易出问题。”
新东方三驾马车：真实版“中国合伙人”
学校：北京大学
创业者：俞敏洪、徐小平、王强
新东方昔日“三驾马车”中，俞敏洪和王强1980年一同考进北京大学西语系英语专业，两人风格完全不...
ie8 var w= window.open() - “Message: Invalid argument.”
...s the TARGET attribute doc: msdn.microsoft.com/en-us/library/ms534659(v=vs.85).aspx. It clearly says that target can be an arbitrary string and not just the values listed in this answer.
– niaher
Aug 22 '12 at 3:30
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How do I send a POST request as a JSON?
...apsefi.com') req.add_header('X-SP-GATEWAY', 'client_id_asdfeavea561va9685e1gre5ara|client_secret_4651av5sa1edgvawegv1a6we1v5a6s51gv') req.add_header('X-SP-USER-IP', '127.0.0.1') req.add_header('X-SP-USER', '| ge85a41v8e16v1a618gea164g65') req.add_header('Content-Type', 'application/j...
How to convert decimal to hexadecimal in JavaScript
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The code below will convert the decimal value d to hexadecimal. It also allows you to add paddi...
Remove NA values from a vector
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purrr::map(airquality, na.omit) 95.7 107.4 185.5108 129.3 190.50 534795.5 1e+06 b
purrr::map(airquality, ~purrr::discard(.x, .p = is.na)) 3391.7 3648.6 5615.8965 4079.7 6486.45 1121975.4 1e+06 c
For reference, here's the original test of x[!is.na(x)] vs na.o...
Extract a dplyr tbl column as a vector
... works fine with data frames:
> mtcars %>% pull(5)
[1] 3.90 3.90 3.85 3.08 3.15 2.76 3.21 3.69 3.92 3.92 3.92 3.07 3.07 3.07 2.93 3.00 3.23 4.08 4.93 4.22 3.70 2.76 3.15 3.73 3.08 4.08 4.43
[28] 3.77 4.22 3.62 3.54 4.11
A nice way to do this in v0.2 of dplyr:
iris2 %>% select(Species...
How can I use Timer (formerly NSTimer) in Swift?
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Midhun MPMidhun MP
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