大约有 47,000 项符合查询结果（耗时：0.0675秒） [XML]
How can I split a comma delimited string into an array in PHP?
...
10 Answers
10
Active
...
Combining two Series into a DataFrame in pandas
I have two Series s1 and s2 with the same (non-consecutive) indices. How do I combine s1 and s2 to being two columns in a DataFrame and keep one of the indices as a third column?
...
How to split a string and assign it to variables
...
import (
"fmt"
"strings"
)
func main() {
s := strings.Split("127.0.0.1:5432", ":")
ip, port := s[0], s[1]
fmt.Println(ip, port)
}
Output:
127.0.0.1 5432
One step, for example,
package main
import (
"fmt"
"net"
)
func main() {
host, port, err := net.SplitHost...
What is “2's Complement”?
...positive integers, start counting up, with a maximum of 2(number of bits - 1)-1.
for negative integers, do exactly the same thing, but switch the role of 0's and 1's (so instead of starting with 0000, start with 1111 - that's the "complement" part).
Let's try it with a mini-byte of 4 bits (we'll ca...
What does it mean to start a PHP function with an ampersand?
...
157
An ampersand before a function name means the function will return a reference to a variable i...
Do I need a content-type header for HTTP GET requests?
...
115
According to the RFC 7231 section 3.1.5.5:
A sender that generates a message containing a ...
Passing a list of kwargs?
...
161
Yes. You do it like this:
def method(**kwargs):
print kwargs
keywords = {'keyword1': 'foo'...
Can you use an alias in the WHERE clause in mysql?
...ot yet
be determined when the WHERE clause
is executed. See Section B.1.5.4,
“Problems with Column Aliases”.
share
|
improve this answer
|
follow
|...
Can an enum class be converted to the underlying type?
...
180
I think you can use std::underlying_type to know the underlying type, and then use cast:
#inc...
Stop pip from failing on single package when installing with requirements.txt
...ine with pip install may be a workaround.
cat requirements.txt | xargs -n 1 pip install
Note: -a parameter is not available under MacOS, so old cat is more portable.
share
|
improve this answer
...