快速排序golang

package main

import "fmt"

func qsort(data []int) {
if len(data) <= 1 {
return
}
mid, i := data[0], 1
head, tail := 0, len(data)-1
for i = 1; i <= tail; {
                if data[i] > mid {
data[i], data[tail] = data[tail], data[i]
tail--
} else {
data[i], data[head] = data[head], data[i]
head++
i++
}
                }
data[head] = mid
qsort(data[:head])
qsort(data[head+1:])
}
func main() {
fmt.Println("Hello, 世界")

a:=[]int{1,2,3}
qsort(a)
for x:=range(a){
fmt.Println(x)}
}

线上spark和sqoop问题修复

线上sqoop日志错误如下，https://stackoverflow.com/questions/38649071/getting-an-file-exists-error-while-import-into-hive-using-sqoop
https://stackoverflow.com/questions/38649071/getting-an-file-exists-error-while-import-into-hive-using-sqoop

参见这两个，大概意思是说sqoop导数据的时候，会将数据先放到一个临时路径下，然后在挪过去。如果这个临时路径存在，就会报错，哪怕选线是overwrite也不行；

spark错误

http://blog.csdn.net/a921122/article/details/45095845
https://stackoverflow.com/questions/32820087/spark-multiple-spark-submit-in-parallel

scala错误

java.lang.NoSuchMethodError: scala.runtime.IntRef.create(I)Lscala/runtime/IntRef

scala版本问题

sse操作

https://msdn.microsoft.com/en-us/library/ybhzf6dk(v=vs.71).aspx
https://msdn.microsoft.com/en-us/library/yd9wecaa(v=vs.120).aspx
https://msdn.microsoft.com/en-us/library/yd9wecaa(v=vs.120).aspx
https://msdn.microsoft.com/en-us/library/2x1se8ha(VS.80).aspx
https://msdn.microsoft.com/en-us/library/22kbk6t9(VS.80).aspx
https://msdn.microsoft.com/en-us/library/c9848chc(v=vs.90).aspx
https://msdn.microsoft.com/en-us/library/yd9wecaa(v=vs.120).aspx
https://msdn.microsoft.com/en-us/library/ybhzf6dk(v=vs.71).aspx
https://msdn.microsoft.com/en-us/library/tk1t2tbz(v=vs.80).aspx

libffm编译

环境centos6.5，现有gcc 4.4.7

因为编译libffm需要c++11的支持，所以安装如下

GCC 5.2
wget https://copr.fedoraproject.org/coprs/hhorak/devtoolset-4-rebuild-bootstrap/repo/epel-6/hhorak-devtoolset-4-rebuild-bootstrap-epel-6.repo -O /etc/yum.repos.d/devtools-4.repo
yum install devtoolset-4-gcc devtoolset-4-binutils devtoolset-4-gcc-c++ -y

临时编译前使用
export CC=/opt/rh/devtoolset-4/root/usr/bin/gcc
export CPP=/opt/rh/devtoolset-4/root/usr/bin/cpp
export CXX=/opt/rh/devtoolset-4/root/usr/bin/c++

直接make，发现g++并没有生效

修改makefile

CXX = g++

为

CXX = /opt/rh/devtoolset-4/root/usr/bin/g++

然后编译成功

java 执行常见命令

java -cp HelloWorld.jar org.test.HelloWorld

java -jar *.jar

thrift 使用

http://blog.csdn.net/lener0611/article/details/50546569


http://sunliwen.com/2012/02/apache-thrift-on-ubuntu-10-04/