如何在AWK中替代正则表达式？

Question

用AWK脚本替换正则表达式的最简单方法是什么？
我的目标是搜索模式：

/a|b/

在句子中：

I read a book "GAWK: Effective AWK Programming", but I can not figure it out.

并替换为：

ABC/a|b/ABC

结果将是：

I reABCaABCd ABCaABC ABCbABCook "GAWK: Effective AWK ProgrABCaABCmming", but I cABCaABCn not figure it out.

Answer 1

您可以尝试：

$ awk '{ gsub(/[ab]/,"ABC&ABC")}1' file 
I reABCaABCd ABCaABC ABCbABCook "GAWK: Effective AWK ProgrABCaABCmming", ABCbABCut I cABCaABCn not figure it out.

文件在哪里：

I read a book "GAWK: Effective AWK Programming", but I can not figure it out.

Answer 2

sed对于此任务可能更好

echo "I re..." | sed 's/[ab]/ABC&ABC/g'