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Getting and removing the first character of a string
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170
See ?substring.
x <- 'hello stackoverflow'
substring(x, 1, 1)
## [1] "h"
substring(x, 2)
#...
Getting java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory exception
...of spring & getting this exception.
I have already included common-logging1.1.1.jar and spring.jar file. Could you please help to out?
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How to split a string and assign it to variables
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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...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
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一、OceanBase启动时的使用模式
二、 基础数据结构
2.1 easy_list_t
2.2 easy_pool_t
2.3 easy_buf_t
2.4 easy_connection_t
三、 连接建立
四、 同步处理(OceanBase少量使用这种模式)
五、 异步处理(OceanBase大量采用这种模式)
六、 资源管...
How to store standard error in a variable
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18 Answers
18
Active
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How can I pipe stderr, and not stdout?
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11 Answers
11
Active
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Export database schema into SQL file
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150
You can generate scripts to a file via SQL Server Management Studio, here are the steps:
Rig...
Add st, nd, rd and th (ordinal) suffix to a number
...ate a string of text based on a current day. So, for example, if it is day 1 then I would like my code to generate = "Its the 1* st *".
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Why do we need tuples in Python (or any immutable data type)?
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124
immutable objects can allow substantial optimization; this is presumably why strings are also...
How do I declare and initialize an array in Java?
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For primitive types:
int[] myIntArray = new int[3];
int[] myIntArray = {1, 2, 3};
int[] myIntArray = new int[]{1, 2, 3};
// Since Java 8. Doc of IntStream: https://docs.oracle.com/javase/8/docs/api/java/util/stream/IntStream.html
int [] myIntArray = IntStream.range(0, 100).toArray(); // From 0 ...