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Is it ok to use dashes in Python files when trying to import them?
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123
One other thing to note in your code is that import is not a function. So import(python-code)...
Dynamically select data frame columns using $ and a character value
...is a reproducible example below:
# set seed for reproducibility
set.seed(123)
df <- data.frame( col1 = sample(5,10,repl=T) , col2 = sample(5,10,repl=T) , col3 = sample(5,10,repl=T) )
# We want to sort by 'col3' then by 'col1'
sort_list <- c("col3","col1")
# Use 'do.call' to call order. S...
Remove rows with all or some NAs (missing values) in data.frame
...mptions --------------------
fakeData <- function(m, n, p){
set.seed(123)
m <- matrix(runif(m*n), nrow=m, ncol=n)
m[m<p] <- NA
return(m)
}
df <- cbind( data.frame(id = paste0('ID',seq(row_size)),
stringsAsFactors = FALSE),
data.frame(fak...
App Inventor 2 列表积木完全指南：从入门到精通，一篇搞定数据存储 - App...
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二维列表就是「列表的列表」，例如 [["abc","123"],["xyz","456"]]。操作方式和一维列表几乎一样，区别在于取出的元素本身又是一个列表。这在解析 JSON 数据时极为常见。
总结
App Inventor 2 的列表...
Search and Replace with RegEx components in Atom editor
...stuff on it before replacing? For example, if $1 captures a number group - 123, replace it by adding 1 to it, something like eval($1+1)..?
– SexyBeast
Feb 22 '15 at 0:35
7
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How do short URLs services work?
... How do they handle url parameters? For example www.digg.com?filter=123
– Ronen
Aug 12 '18 at 7:44
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Git serve: I would like it that simple
... so on the client (your Linux box), you would need to do:
git clone git://123.456.789.111/ project
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Base64 encoding and decoding in client-side Javascript
...=s.length;
var A="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
for(i=0;i<64;i++){e[A.charAt(i)]=i;}
for(x=0;x<L;x++){
c=e[s.charAt(x)];b=(b<<6)+c;l+=6;
while(l>=8){((a=(b>>>(l-=8))&0xff)||(x<(L-2)))&&(r+=w(a));}...
How to remove all breakpoints in one step in Google Chrome?
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123
Since recently (Chrome 18), you can right-click any breakpoint in the Breakpoints pane and voi...
Ruby combining an array into one string
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what if you were joining digits? [1,2,3] => 123?
– stevenspiel
Dec 9 '13 at 19:08
3
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