linux - 在输出字段周围添加双引号

Question

我试图用双引号将 awk 输出字段括起来，但是，总是遇到错误。此代码在 Ubuntu 系统上以 bash 脚本运行

错误

awk: cmd. line:1: BEGIN {print "<table id="\"alert\"",">"} ; {  print "<tr><td class="\"site\"",">" $1 "</td><td class="\"fdate\"",">" $2 "</td><td class="\"prcp\"",">" $3 "</td><td class="\"snow\"",">" $4 "</td><td class="\"tmp2m\"",">" $5 "</td><td class="\"dpt2m\"",">" $6 "</td><td class="\"wchill\"",">" $7 "</td><td class="\"wind10m\"",">" $8 "</td></tr>"} ; END { print "</table>"}
awk: cmd. line:1:                          ^ backslash not last character on line
awk: cmd. line:1: BEGIN {print "<table id="\"alert\"",">"} ; {  print "<tr><td class="\"site\"",">" $1 "</td><td class="\"fdate\"",">" $2 "</td><td class="\"prcp\"",">" $3 "</td><td class="\"snow\"",">" $4 "</td><td class="\"tmp2m\"",">" $5 "</td><td class="\"dpt2m\"",">" $6 "</td><td class="\"wchill\"",">" $7 "</td><td class="\"wind10m\"",">" $8 "</td></tr>"} ; END { print "</table>"}
awk: cmd. line:1:                          ^ syntax error

尝试的代码

awk -F, 'BEGIN {print "<table id="\"alert\"",">"} ; {  print "<tr><td class="\"site\"",">" $1 "</td><td class="\"fdate\"",">" $2 "</td><td class="\"prcp\"",">" $3 "</td><td class="\"snow\"",">" $4 "</td><td class="\"tmp2m\"",">" $5 "</td><td class="\"dpt2m\"",">" $6 "</td><td class="\"wchill\"",">" $7 "</td><td class="\"wind10m\"",">" $8 "</td></tr>"} ; END { print "</table>"}' /home/weather/csv > /home/weather/csv.html

Answer 1

你有太多引述，你可能不想用逗号分隔要打印的各个项目:

$ awk -F, 'BEGIN {print "<table id=\"alert\"" ">"}'
<table id="alert">

有时将双引号设置为变量有助于提高可读性:

$ awk -F, -v q='"' 'BEGIN {print "<table id=" q "alert" q ">"}'
<table id="alert">