linux 中 判断一列数据中指定的字符是否有连续的重复

 

001、

[root@PC1 test]# ls
a.txt  b.txt
[root@PC1 test]# cat a.txt       ## 测试数据a.txt
gene
exon
gene
exon
exon
exon
exon
[root@PC1 test]# awk 'BEGIN{idx=0} {if($0 == "gene") {idx++} else {idx = 0}; if(idx > 1) {print NR, "duplication"; exit}}' a.txt
[root@PC1 test]# cat b.txt        ## 测试数据b.txt
gene
exon
gene
exon
gene
gene
exon
[root@PC1 test]# awk 'BEGIN{idx=0} {if($0 == "gene") {idx++} else {idx = 0}; if(idx > 1) {print NR, "duplication"; exit}}' b.txt
6 duplication