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How to read data when some numbers contain commas as thousand separator?
...tomatically. First create a new class definition, then create a conversion function and set it as an "as" method using the setAs function like so:
setClass("num.with.commas")
setAs("character", "num.with.commas",
function(from) as.numeric(gsub(",", "", from) ) )
Then run read.csv like:
...
Your build failed due to an error in the AAPT stage, not because of an...
...文导致的，换成英文的就ok，这个问题先记录下来，后续fun23.cn平台可以解决。
----------------以下是参考资料-----------
需要注意的事项：该项目已超过 30MB 的最大大小该项目已超出建议的最大 10 个屏幕该项目有一个包含过多文...
Why does PHP consider 0 to be equal to a string?
...r, which will check the type and will not implicitly typecast.
P.S: a PHP fun fact: a == b does not imply that b == a. Take your example and reverse it: if ("e" == $item['price']) will never actually be fulfilled provided that $item['price'] is always an integer.
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When should I write the keyword 'inline' for a function/method?
...l only inline function calls where the definition is available at the call site. Leaving all function in the cpp file would limit inlining to that file. I suggest defining small one liners inline in the .h as the cost to compilation speed is negligible and you're almost guaranteed the compiler wil...
How to update a plot in matplotlib?
... the units in the time scale (x-axis) and then I recalculate and call this function plots() . I want the plot to simply update, not append another plot to the figure.
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https connection using CURL from command line
...
I had the same problem - I was fetching a page from my own site, which was served over HTTPS, but curl was giving the same "SSL certificate problem" message. I worked around it by adding a -k flag to the call to allow insecure connections.
curl -k https://whatever.com/script.php
E...
How to secure MongoDB with username and password
...l ask for the user name & password. I tried the tutorial from the MongoDB site and did following:
15 Answers
...
Split comma-separated strings in a column into separate rows
..., "B", "B", "B", "B", "A")
library(data.table)
library(magrittr)
Define function for benchmark runs of problem size n
run_mb <- function(n) {
# compute number of benchmark runs depending on problem size `n`
mb_times <- scales::squish(10000L / n , c(3L, 100L))
cat(n, " ", mb_times, "...
Difference between toFixed() and toPrecision()?
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I just visited w3fools and was not convinced whatsoever. I don't even see any argument. All I see is an advertisement for two other sites.
– NiCk Newman
Mar 8 '16 at 4:12
...
Import PEM into Java Key Store
....generateCertificate(new ByteArrayInputStream(certBytes));
}
}
Have fun.
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