大约有 47,000 项符合查询结果（耗时：0.0243秒） [XML]
Truncate number to two decimal places without rounding
Suppose I have a value of 15.7784514, I want to display it 15.77 with no rounding.
36 Answers
...
Fastest way to replace NAs in a large data.table
...
10 Answers
10
Active
...
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...
Does JavaScript have a method like “range()” to generate a range within the supplied bounds?
...
1
2
3
Next
1632
...
Java synchronized static methods: lock on object or class
...
129
Since a static method has no associated object, will the synchronized keyword lock on the ...
How does Dijkstra's Algorithm and A-Star compare?
...
11 Answers
11
Active
...
MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
...库缺少的数据补上
下面是能想到和找到的几个方案
1 从新从0开始同步，虽然对主库的使用没有影响，但是那么大的数据量，对性能，网络影响有点大，数据丢失的应该很少
2 主库dump数据，锁库，然后同步，不好。 影响业...
Remove rows with all or some NAs (missing values) in data.frame
...
16 Answers
16
Active
...
Setting different color for each series in scatter plot on matplotlib
...
import matplotlib.pyplot as plt
import matplotlib.cm as cm
x = np.arange(10)
ys = [i+x+(i*x)**2 for i in range(10)]
colors = cm.rainbow(np.linspace(0, 1, len(ys)))
for y, c in zip(ys, colors):
plt.scatter(x, y, color=c)
Or you can make your own colour cycler using itertools.cycle and specif...
How to model type-safe enum types?
...
189
http://www.scala-lang.org/docu/files/api/scala/Enumeration.html
Example use
object Main ex...