大约有 44,600 项符合查询结果（耗时：0.0338秒） [XML]
Print all but the first three columns
...s",$i OFS; if(NF) printf "%s",$NF; printf ORS}'
### Example ###
$ echo '1 2 3 4 5 6 7' |
awk '{for(i=4;i<NF;i++)printf"%s",$i OFS;if(NF)printf"%s",$NF;printf ORS}' |
tr ' ' '-'
4-5-6-7
Sudo_O proposes an elegant improvement using the ternary operator NF?ORS:OFS
$ echo '1 2 3 4 5 6 7' |
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从功能上来说大致分为3类，在连接菜单下：
但是每种类型下面仍...
java.net.ConnectException: localhost/127.0.0.1:8080 - Connection refused
...
292
Since you have not specified you are connected to a server from the device or emulator so I gu...
How to install GCC piece by piece with GMP, MPFR, MPC, ELF, without shared libraries?
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124
The Easy Way
If you're a typical developer, you can install the easy way, using instructions a...
How to extract one column of a csv file
...
You could use awk for this. Change '$2' to the nth column you want.
awk -F "\"*,\"*" '{print $2}' textfile.csv
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Insert a row to pandas dataframe
...
Just assign row to a particular index, using loc:
df.loc[-1] = [2, 3, 4] # adding a row
df.index = df.index + 1 # shifting index
df = df.sort_index() # sorting by index
And you get, as desired:
A B C
0 2 3 4
1 5 6 7
2 7 8 9
See in Pandas documentation Indexing: Se...
What is the best regular expression to check if a string is a valid URL?
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1
2
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415
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Focus Input Box On Load
...ction() {
var input = document.getElementById("myinputbox").focus();
}
2) How to place cursor at the end of the input text?
Here's a non-jQuery solution with some borrowed code from another SO answer.
function placeCursorAtEnd() {
if (this.setSelectionRange) {
// Double the length bec...
How to return a part of an array in Ruby?
...ndex) are out of range.
a = [ "a", "b", "c", "d", "e" ]
a[2] + a[0] + a[1] #=> "cab"
a[6] #=> nil
a[1, 2] #=> [ "b", "c" ]
a[1..3] #=> [ "b", "c", "d" ]
a[4..7] #=> [ "e...
C++ performance challenge: integer to std::string conversion
...
#include <string>
const char digit_pairs[201] = {
"00010203040506070809"
"10111213141516171819"
"20212223242526272829"
"30313233343536373839"
"40414243444546474849"
"50515253545556575859"
"60616263646566676869"
"70717273747576777879"
"8081828384858...