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教育网的高校IP类聚
region=BJ
162.105/16, 166.111/16, 202.4.128/19,
202.112.64/18, 202.112.128/17, 202.113/16, 202.204/14, 210.31/16, 211.68/16, 211.71/16,
211.81/16, 211.82/16, 219.242/16, 219.243.0/17, 219.243.128/18,
219.224.0/17, 219.224.128/18, 219.225/16, 219.226/16, 222.28/14,
222.199/16, 59.64/14, 203.91.120/21, 121.193/16, 121.194/15,
118.228/15, 118.230/16, 121.52.160/19, 115.24/14, 183.172/14,
101.4/14

region=XA
202.117/16, 202.200/15, 210.26/15, 218.195/16, 219.244/14, 222.23/16, 222.24/15,
59.74/15, 59.76/16, 120.95/16, 115.154/15, 111.114/15, 49.208/15

region=CD
202.115/16, 202.202/15, 210.40/15, 211.83/16, 218.194/16, 219.221/16, 222.18/15, 222.196/15, 222.198/16, 121.48/15, 120.94/16,
113.54/15, 180.84/15, 223.128/15

region=GZ
202.38.192/18, 202.116/16, 202.192/15, 210.36/14, 211.66/16, 218.192/16, 219.222/15, 219.227/16,
222.16/15, 222.200/14, 125.216/15, 125.218/16, 116.56/15, 116.13/16,
110.64/15, 1.184/15

region=WH
202.114/16, 202.196/15, 210.42/15, 211.69/16, 211.67/16, 211.84/15, 218.196/14, 222.20/15, 222.22/16, 59.68/14,
125.219/16, 125.220/15, 122.204/14, 115.156/15, 115.158/16, 183.168/15, 183.170/16,
49.120/14

region=NJ
202.38.64/19, 202.119/16, 202.194/15, 210.44/15, 210.28/15, 211.64/15, 211.70/16, 211.86/15, 219.218/15, 219.230/15,
222.192/14, 222.206/15, 58.192/15, 121.248/14,
114.212/15, 114.214/16, 180.201/16, 180.208/15, 1.51/16, 223.2/15,
101.76/15, 42.244/15

region=SH
202.120/15, 210.32/14, 211.80/16, 218.193/16, 219.220/16, 219.228/15, 222.204/15, 59.77/16, 59.78/15,
58.198/15, 121.192/16, 111.186/15, 175.185/16, 175.186/15, 49.52/14

region=SY
202.118/16, 202.198/15, 210.46/15, 210.30/16, 219.216/15, 222.26/15, 59.72/15, 125.222/15,
58.154/15, 118.202/15, 111.116/15, 49.140/15

region=MISC
202.38.96/19, 202.38.140/23, 202.38.184/21, 202.127.216/21, 202.127.224/19, 202.112.0/18, 210.25.128/18,
219.243.192/18, 219.224.192/18, 210.25.0/17, 42.246/15

region=CIS
58.194/15, 58.200/13

region=TTN
58.196/15

region=TEIN2
202.179.240/20

来自官方示例

$array1 = array("color" => "red", 2, 4);
$array2 = array("a", "b", "color" => "green", "shape" => "trapezoid", 4);
$result = array_merge($array1, $array2);
print_r($result);

数组中有的标记了下标，有的没有标记下标(索引)

有下标的将会沿用下标，如果下标相同，则会覆盖
没有下标的，将会从0开始索引
值不会覆盖

结果

Array ( [color] => green [0] => 2 [1] => 4 [2] => a [3] => b [shape] => trapezoid [4] => 4 )

http://php.net/manual/en/function.array-intersect.php#84286

后面的数组与第一个数组比较，返回交集是一个数组，且下标是第一个数组的下标

$array1 = array(2, 4, 6, 8, 10, 12);
$array2 = array(1, 2, 3, 4, 5, 6);

var_dump(array_intersect($array1, $array2));
var_dump(array_intersect($array2, $array1));

结果

array(3) { [0]=> int(2) [1]=> int(4) [2]=> int(6) }
array(3) { [1]=> int(2) [3]=> int(4) [5]=> int(6) }

查看可以清理的文件

git clean -ndX

确定好之后要清理运行

git clean -fdX

查看 clean 的 help

$ git help clean

git-clean - Remove untracked files from the working tree
-n, --dry-run - Don't actually remove anything, just show what would be done. 测试查看哪些文件可以被删除。
-d - Remove untracked directories in addition to untracked files. 同时清理目录
-X - Remove only files ignored by git. 清理被 ignored 的文件

参考:

http://stackoverflow.com/questions/466764/show-ignored-files-in-git