大约有 43,000 项符合查询结果（耗时：0.0230秒） [XML]
Repeat each row of data.frame the number of times specified in a column
...), 1:2]
Result:
var1 var2
1 a d
2 b e
2.1 b e
3 c f
3.1 c f
3.2 c f
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What is the fastest factorial function in JavaScript? [closed]
...torial sequence.
The first 100 numbers are:
1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 39916800, 479001600, 6227020800, 87178291200, 1307674368000, 20922789888000, 355687428096000, 6402373705728000, 121645100408832000, 2432902008176640000, 51090942171709440000, 1124000727777607680000, 2585...
Big O, how do you calculate/approximate it?
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23 Answers
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Getting rid of \n when using .readlines() [duplicate]
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312
This should do what you want (file contents in a list, by line, without \n)
with open(filenam...
JavaScript + Unicode regexes
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answered Nov 11 '08 at 12:35
TomalakTomalak
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Split (explode) pandas dataframe string entry to separate rows
...ws()]).reset_index()
Out[55]:
index 0
0 a 1
1 b 1
2 c 1
3 d 2
4 e 2
5 f 2
Then you just have to rename the columns
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ls command: how can I get a recursive full-path listing, one line per file?
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390
If you really want to use ls, then format its output using awk:
ls -R /path | awk '
/:$/&...
Find XOR of all numbers in a given range
...s table for 4-bit numbers:
0000 <- 0 [a]
0001 <- 1 [1]
0010 <- 3 [a+1]
0011 <- 0 [0]
0100 <- 4 [a]
0101 <- 1 [1]
0110 <- 7 [a+1]
0111 <- 0 [0]
1000 <- 8 [a]
1001 <- 1 [1]
1010 <- 11 [a+1]
1011 <- 0 [0]
1100 <- 12 [a]
1101 <- 1 [1]
1110 <- 15 ...
What are the advantages of using nullptr?
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answered Dec 11 '12 at 8:39
NawazNawaz
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How is std::function implemented?
...t; '\n' };
fun f2 = f1;
f1(); // prints 5
fun f3 = f1;
f2(); // prints 5
f3(); // prints 6 (copy after first increment)
}
The test indicates that f2 gets a copy of the callable entity, rather than a reference. If the callable ...