AWK - !i++ 做什么
AWK - What does !i++ do
我有以下代码段：
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerECHLane") {
~ /ms/ ( SUM10 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min10 = (min < ? min : )
max10 = (max > ? max : )
} #End of for
} #End of for wrapper
}
我想知道 !i++ 做了什么，因为我知道 i++ 在变量使用后递增，而 ++i 在变量使用前递增。
我试过 Google 但它只显示了 i++ 和 ++i
之间的区别
提前致谢。
正如所承诺的，请参阅以下完整脚本：
#!/usr/bin/gawk -f
BEGIN {
min01 = 0
min02 = 0
min03 = 0
min04 = 0
min05 = 0
min06 = 0
min07 = 0
min08 = 0
min09 = 0
min10 = 0
max01 = 0
max02 = 0
max03 = 0
max04 = 0
max05 = 0
max06 = 0
max07 = 0
max08 = 0
max09 = 0
max10 = 0
SUM01 = 0
SUM02 = 0
SUM03 = 0
SUM04 = 0
SUM05 = 0
SUM06 = 0
SUM07 = 0
SUM08 = 0
SUM09 = 0
SUM10 = 0
} #End of BEGIN
{ #Start of MID
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerPackingInfeedHanging") {
~ /ms/ ( SUM01 += )
if ( ~ /ms/) {
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min01 = (min < ? min : )
max01 = (max > ? max : )
} #End of for
}} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerPackingAreaNOK") {
~ /ms/ ( SUM02 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min02 = (min < ? min : )
max02 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerPackingAreaMPANOK") {
~ /ms/ ( SUM03 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min03 = (min < ? min : )
max03 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerPackingOrderBufferHanging") {
~ /ms/ ( SUM04 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min04 = (min < ? min : )
max04 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerTUNotification") {
~ /ms/ ( SUM05 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min05 = (min < ? min : )
max05 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerLaneStatusLaneLocker") {
~ /ms/ ( SUM06 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min06 = (min < ? min : )
max06 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerPackingHangingBufferLane") {
~ /ms/ ( SUM07 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min07 = (min < ? min : )
max07 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerLaneStatusHangingMPA") {
~ /ms/ ( SUM08 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min08 = (min < ? min : )
max08 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerMPAHangingBufferLane") {
~ /ms/ ( SUM09 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min09 = (min < ? min : )
max09 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerECHLane") {
~ /ms/ ( SUM10 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min10 = (min < ? min : )
max10 = (max > ? max : )
} #End of for
} #End of for wrapper
}
MSG_TYPE[substr(,match(,":")+1,match(,")")-15)]++;
} #End of MID
END {
for (b in MSG_TYPE)
if (b == "TelegramHandlerPackingInfeedHanging") {
print b
print "MIN: "min01
print "MAX: "max01
print "AVG: "SUM01/FNR"ms"
} else
if (b == "TelegramHandlerPackingAreaNOK") {
print b
print "MIN: "min02
print "MAX: "max02
print "AVG: "SUM02/FNR"ms"
} else
if (b == "TelegramHandlerPackingAreaMPANOK") {
print b
print "MIN: "min03
print "MAX: "max03
print "AVG: "SUM03/FNR"ms"
} else
if (b == "TelegramHandlerPackingOrderBufferHanging") {
print b
print "MIN: "min04
print "MAX: "max04
print "AVG: "SUM04/FNR"ms"
} else
if (b == "TelegramHandlerTUNotification") {
print b
print "MIN: "min05
print "MAX: "max05
print "AVG: "SUM05/FNR"ms"
} else
if (b == "TelegramHandlerLaneStatusLaneLocker") {
print b
print "MIN: "min06
print "MAX: "max06
print "AVG: "SUM06/FNR"ms"
} else
if (b == "TelegramHandlerPackingHangingBufferLane") {
print b
print "MIN: "min07
print "MAX: "max07
print "AVG: "SUM07/FNR"ms"
} else
if (b == "TelegramHandlerLaneStatusHangingMPA") {
print b
print "MIN: "min08
print "MAX: "max08
print "AVG: "SUM08/FNR"ms"
} else
if (b == "TelegramHandlerMPAHangingBufferLane") {
print b
print "MIN: "min09
print "MAX: "max09
print "AVG: "SUM09/FNR"ms"
} else
if (b == "TelegramHandlerECHLane") {
print b
print "MIN: "min10
print "MAX: "max10
print "AVG: "SUM10/FNR"ms"
}
} #End of END
返回的输出示例：
TelegramHandlerPackingInfeedHanging
MIN: 19.7ms
MAX: 19.7ms
AVG: 3.05067ms
TelegramHandlerPackingAreaNOK
MIN: 25.3ms
MAX: 25.3ms
AVG: 0.00706937ms
TelegramHandlerPackingAreaMPANOK
MIN: 22.3ms
MAX: 22.3ms
AVG: 4.26834e-05ms
TelegramHandlerPackingOrderBufferHanging
MIN: 12.0ms
MAX: 12.0ms
AVG: 1.60741ms
TelegramHandlerTUNotification
MIN: 8.7ms
MAX: 8.7ms
AVG: 4.00978ms
TelegramHandlerLaneStatusLaneLocker
MIN: 15.0ms
MAX: 15.0ms
AVG: 0.0527127ms
TelegramHandlerPackingHangingBufferLane
MIN: 23.9ms
MAX: 23.9ms
AVG: 13.3463ms
TelegramHandlerLaneStatusHangingMPA
MIN: 312.5ms
MAX: 312.5ms
AVG: 0.0126846ms
TelegramHandlerMPAHangingBufferLane
MIN: 57.0ms
MAX: 57.0ms
AVG: 0.135032ms
TelegramHandlerECHLane
MIN: 7.0ms
MAX: 7.0ms
AVG: 2.81495ms
这部分是在做我想做的事情。 Return 消息，substr(,match(,":")+1,match(,")")-15) 以及 min 处理时间，max 处理时间和 AVG 处理时间。尽管 min 和 max 值相同，所以我认为这些值正在被覆盖而不是单独计算，并将它们保存到变量 min01 - min10、max01 - max10、SUM01 - SUM10。
那是真正的 awk 代码吗？因为它看起来确实不像...
如果您正在看类似这样的内容：
!i++ { min = }
< min { min = }
（在顶层），那就是混淆了；它的含义与：
{ if (NR==1 || < min) min = ; }
或等同于
NR == 1 || < min { min = ; }
换句话说，如果您在第一行，或者第 11 个字段小于 min 的当前值，请将 min 设置为第 11 个字段的值。在 !i++ 中，i++ 递增 i 但 returns 原始未递增的值作为传递给 ! 的值，这意味着整个表达式：
- 无条件递增
i
- 如果
i 为 0 或在增量 之前未初始化则为真
无论是谁写的，都试图将他们的最小和最大变量初始化为第一个看到的值，并被 awk 的一般 <condition> { <action> } 语法不适用于操作块内所混淆。
记住：i 从零开始，所以 !i 是 1，i++ 是 post 增量，所以 !i++ 也是 1第一次遇到，但第二次 i 是 1，所以 !i++ 是零，第三次我是 2，!i++ 仍然是零，依此类推...
这就是他们要写的内容：
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerECHLane") {
if ( ~ /ms/) {SUM10 += }
if (!i++) {min = ; max = }
{
for (j= NR; j<= FNR; ++j) {
min10 = (min < ? min : )
max10 = (max > ? max : )
} #End of for
} #End of for wrapper
}
但它仍然没有真正意义。
此代码旨在将 min 和 max 值初始化为遇到的第一个值。
作者认为 !i++ (min = ) 等同于
if (!i) {
i++
min=
}
如果 !i++&&(min=)
会是这样
我有以下代码段：
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerECHLane") {
~ /ms/ ( SUM10 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min10 = (min < ? min : )
max10 = (max > ? max : )
} #End of for
} #End of for wrapper
}
我想知道 !i++ 做了什么，因为我知道 i++ 在变量使用后递增，而 ++i 在变量使用前递增。
我试过 Google 但它只显示了 i++ 和 ++i
提前致谢。
正如所承诺的，请参阅以下完整脚本：
#!/usr/bin/gawk -f
BEGIN {
min01 = 0
min02 = 0
min03 = 0
min04 = 0
min05 = 0
min06 = 0
min07 = 0
min08 = 0
min09 = 0
min10 = 0
max01 = 0
max02 = 0
max03 = 0
max04 = 0
max05 = 0
max06 = 0
max07 = 0
max08 = 0
max09 = 0
max10 = 0
SUM01 = 0
SUM02 = 0
SUM03 = 0
SUM04 = 0
SUM05 = 0
SUM06 = 0
SUM07 = 0
SUM08 = 0
SUM09 = 0
SUM10 = 0
} #End of BEGIN
{ #Start of MID
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerPackingInfeedHanging") {
~ /ms/ ( SUM01 += )
if ( ~ /ms/) {
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min01 = (min < ? min : )
max01 = (max > ? max : )
} #End of for
}} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerPackingAreaNOK") {
~ /ms/ ( SUM02 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min02 = (min < ? min : )
max02 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerPackingAreaMPANOK") {
~ /ms/ ( SUM03 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min03 = (min < ? min : )
max03 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerPackingOrderBufferHanging") {
~ /ms/ ( SUM04 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min04 = (min < ? min : )
max04 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerTUNotification") {
~ /ms/ ( SUM05 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min05 = (min < ? min : )
max05 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerLaneStatusLaneLocker") {
~ /ms/ ( SUM06 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min06 = (min < ? min : )
max06 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerPackingHangingBufferLane") {
~ /ms/ ( SUM07 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min07 = (min < ? min : )
max07 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerLaneStatusHangingMPA") {
~ /ms/ ( SUM08 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min08 = (min < ? min : )
max08 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerMPAHangingBufferLane") {
~ /ms/ ( SUM09 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min09 = (min < ? min : )
max09 = (max > ? max : )
} #End of for
} #End of for wrapper
} else
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerECHLane") {
~ /ms/ ( SUM10 += )
!i++ (min = )
!i++ (max = )
{
for (j= NR; j<= FNR; ++j) {
min10 = (min < ? min : )
max10 = (max > ? max : )
} #End of for
} #End of for wrapper
}
MSG_TYPE[substr(,match(,":")+1,match(,")")-15)]++;
} #End of MID
END {
for (b in MSG_TYPE)
if (b == "TelegramHandlerPackingInfeedHanging") {
print b
print "MIN: "min01
print "MAX: "max01
print "AVG: "SUM01/FNR"ms"
} else
if (b == "TelegramHandlerPackingAreaNOK") {
print b
print "MIN: "min02
print "MAX: "max02
print "AVG: "SUM02/FNR"ms"
} else
if (b == "TelegramHandlerPackingAreaMPANOK") {
print b
print "MIN: "min03
print "MAX: "max03
print "AVG: "SUM03/FNR"ms"
} else
if (b == "TelegramHandlerPackingOrderBufferHanging") {
print b
print "MIN: "min04
print "MAX: "max04
print "AVG: "SUM04/FNR"ms"
} else
if (b == "TelegramHandlerTUNotification") {
print b
print "MIN: "min05
print "MAX: "max05
print "AVG: "SUM05/FNR"ms"
} else
if (b == "TelegramHandlerLaneStatusLaneLocker") {
print b
print "MIN: "min06
print "MAX: "max06
print "AVG: "SUM06/FNR"ms"
} else
if (b == "TelegramHandlerPackingHangingBufferLane") {
print b
print "MIN: "min07
print "MAX: "max07
print "AVG: "SUM07/FNR"ms"
} else
if (b == "TelegramHandlerLaneStatusHangingMPA") {
print b
print "MIN: "min08
print "MAX: "max08
print "AVG: "SUM08/FNR"ms"
} else
if (b == "TelegramHandlerMPAHangingBufferLane") {
print b
print "MIN: "min09
print "MAX: "max09
print "AVG: "SUM09/FNR"ms"
} else
if (b == "TelegramHandlerECHLane") {
print b
print "MIN: "min10
print "MAX: "max10
print "AVG: "SUM10/FNR"ms"
}
} #End of END
返回的输出示例：
TelegramHandlerPackingInfeedHanging
MIN: 19.7ms
MAX: 19.7ms
AVG: 3.05067ms
TelegramHandlerPackingAreaNOK
MIN: 25.3ms
MAX: 25.3ms
AVG: 0.00706937ms
TelegramHandlerPackingAreaMPANOK
MIN: 22.3ms
MAX: 22.3ms
AVG: 4.26834e-05ms
TelegramHandlerPackingOrderBufferHanging
MIN: 12.0ms
MAX: 12.0ms
AVG: 1.60741ms
TelegramHandlerTUNotification
MIN: 8.7ms
MAX: 8.7ms
AVG: 4.00978ms
TelegramHandlerLaneStatusLaneLocker
MIN: 15.0ms
MAX: 15.0ms
AVG: 0.0527127ms
TelegramHandlerPackingHangingBufferLane
MIN: 23.9ms
MAX: 23.9ms
AVG: 13.3463ms
TelegramHandlerLaneStatusHangingMPA
MIN: 312.5ms
MAX: 312.5ms
AVG: 0.0126846ms
TelegramHandlerMPAHangingBufferLane
MIN: 57.0ms
MAX: 57.0ms
AVG: 0.135032ms
TelegramHandlerECHLane
MIN: 7.0ms
MAX: 7.0ms
AVG: 2.81495ms
这部分是在做我想做的事情。 Return 消息，substr(,match(,":")+1,match(,")")-15) 以及 min 处理时间，max 处理时间和 AVG 处理时间。尽管 min 和 max 值相同，所以我认为这些值正在被覆盖而不是单独计算，并将它们保存到变量 min01 - min10、max01 - max10、SUM01 - SUM10。
那是真正的 awk 代码吗？因为它看起来确实不像...
如果您正在看类似这样的内容：
!i++ { min = }
< min { min = }
（在顶层），那就是混淆了；它的含义与：
{ if (NR==1 || < min) min = ; }
或等同于
NR == 1 || < min { min = ; }
换句话说，如果您在第一行，或者第 11 个字段小于 min 的当前值，请将 min 设置为第 11 个字段的值。在 !i++ 中，i++ 递增 i 但 returns 原始未递增的值作为传递给 ! 的值，这意味着整个表达式：
- 无条件递增
i - 如果
i为 0 或在增量 之前未初始化则为真
无论是谁写的，都试图将他们的最小和最大变量初始化为第一个看到的值，并被 awk 的一般 <condition> { <action> } 语法不适用于操作块内所混淆。
记住：i 从零开始，所以 !i 是 1，i++ 是 post 增量，所以 !i++ 也是 1第一次遇到，但第二次 i 是 1，所以 !i++ 是零，第三次我是 2，!i++ 仍然是零，依此类推...
这就是他们要写的内容：
if (substr(,match(,":")+1,match(,")")-15) == "TelegramHandlerECHLane") {
if ( ~ /ms/) {SUM10 += }
if (!i++) {min = ; max = }
{
for (j= NR; j<= FNR; ++j) {
min10 = (min < ? min : )
max10 = (max > ? max : )
} #End of for
} #End of for wrapper
}
但它仍然没有真正意义。
此代码旨在将 min 和 max 值初始化为遇到的第一个值。
作者认为 !i++ (min = ) 等同于
if (!i) {
i++
min=
}
如果 !i++&&(min=)