awk实现group by 功能
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[app_usr@ haha]$ ls
BOSSNM_0_3032_9069_50_H1_20120315_020_00000011_000.json BOSSNM_0_3032_9069_50_H1_20120315_020_00000015_000.json
BOSSNM_0_3032_9069_50_H1_20120315_020_00000012_000.json BOSSNM_0_3333_9069_50_H1_20120315_020_00000011_000.json
BOSSNM_0_3032_9069_50_H1_20120315_020_00000013_000.json BOSSNM_0_3333_9069_50_H1_20120315_020_00000012_000.json
BOSSNM_0_3032_9069_50_H1_20120315_020_00000014_000.json BOSSNM_0_3333_9069_50_H1_20120315_020_00000013_000.json
[app_usr@ haha]$
[app_usr@ haha]$ ls | awk '{a[substr($0, 10, 9)] += 1}END{for (i in a){printf "%s %d\n", i, a[i]} }'
3333_9069 3
3032_9069 5
[app_usr@ haha]$
[app_usr@ haha]$
BOSSNM_0_3032_9069_50_H1_20120315_020_00000011_000.json BOSSNM_0_3032_9069_50_H1_20120315_020_00000015_000.json
BOSSNM_0_3032_9069_50_H1_20120315_020_00000012_000.json BOSSNM_0_3333_9069_50_H1_20120315_020_00000011_000.json
BOSSNM_0_3032_9069_50_H1_20120315_020_00000013_000.json BOSSNM_0_3333_9069_50_H1_20120315_020_00000012_000.json
BOSSNM_0_3032_9069_50_H1_20120315_020_00000014_000.json BOSSNM_0_3333_9069_50_H1_20120315_020_00000013_000.json
[app_usr@ haha]$
[app_usr@ haha]$ ls | awk '{a[substr($0, 10, 9)] += 1}END{for (i in a){printf "%s %d\n", i, a[i]} }'
3333_9069 3
3032_9069 5
[app_usr@ haha]$
[app_usr@ haha]$
0 0
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