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typos fixed, added note for inplace suffix

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gnu_awk.md

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`‎gnu_awk.md`

Lines changed: 11 additions & 14 deletions

Original file line number	Diff line number	Diff line change
`@@ -927,6 +927,7 @@ I bought two bananas and three mangoes`
`927`	`927`	```
`928`	`928`
`929`	`929`	* to create backups of original file, set `INPLACE_SUFFIX` variable
	`930`	+* Note that in newer versions, you have to use `inplace::suffix` instead of `INPLACE_SUFFIX`
`930`	`931`
`931`	`932`	```bash
`932`	`933`	`$ awk -i inplace -v INPLACE_SUFFIX='.bkp' '{gsub("three", "3")} 1' f1`
`@@ -1333,10 +1334,11 @@ $ awk '/END/{print p2} {p2=p1; p1=0ドル}' range.txt`
`1333`	`1334`	`1234`
`1334`	`1335`	`b`
`1335`	`1336`	`$ # save all lines in an array for generic case`
`1336`		`-$ awk '/END/{print a[NR-3]} {a[NR]=0ドル}' range.txt`
`1337`		`-BEGIN`
`1338`		`-a`
`1339`		`-$ # or use the reversing trick`
	`1337`	`+$ # NR>n is checked to avoid printing empty line if there is a match`
	`1338`	`+$ # within first n lines`
	`1339`	`+$ awk -v n=3 '/BEGIN/ && NR>n{print a[NR-n]} {a[NR]=0ドル}' range.txt`
	`1340`	`+6789`
	`1341`	`+$ # or, use the reversing trick`
`1340`	`1342`	`$ tac range.txt \| awk 'n && !--n; /END/{n=3}' \| tac`
`1341`	`1343`	`BEGIN`
`1342`	`1344`	`a`
`@@ -1627,7 +1629,7 @@ Amy sports_rep`
`1627`	`1629`	`Tia placement_rep`
`1628`	`1630`
`1629`	`1631`	`$ awk -v OFS='\t' 'NR==FNR{r[1ドル]=2ドル; next}`
`1630`		`- {NF++; $NF = NR==1 ? "Role" : $NF=r[2ドル]} 1' list4 marks.txt`
	`1632`	`+ {$(NF+1) = FNR==1 ? "Role" : r[2ドル]} 1' list4 marks.txt`
`1631`	`1633`	`Dept Name Marks Role`
`1632`	`1634`	`ECE Raj 53 class_rep`
`1633`	`1635`	`ECE Joel 72`
`@@ -2170,7 +2172,7 @@ $ echo 'foo:123:bar:baz' \| awk -f quotes.awk`
`2170`	`2172`
`2171`	`2173`	```bash
`2172`	`2174`	`$ awk -o -v OFS='\t' 'NR==FNR{r[1ドル]=2ドル; next}`
`2173`		`- {NF++; if(FNR==1)$NF="Role"; else $NF=r[2ドル]} 1' list4 marks.txt`
	`2175`	`+ {$(NF+1) = FNR==1 ? "Role" : r[2ドル]} 1' list4 marks.txt`
`2174`	`2176`	`Dept Name Marks Role`
`2175`	`2177`	`ECE Raj 53 class_rep`
`2176`	`2178`	`ECE Joel 72`
@@ -2185,7 +2187,7 @@ File name can be passed along `-o` option, otherwise by default `awkprof.out` wi
`2185`	`2187`
`2186`	`2188`	```bash
`2187`	`2189`	`$ cat awkprof.out`
`2188`		`- # gawk profile, created Tue Oct 24 15:10:02 2017`
	`2190`	`+ # gawk profile, created Mon Mar 16 10:11:11 2020`
`2189`	`2191`
`2190`	`2192`	`# Rule(s)`
`2191`	`2193`
`@@ -2195,12 +2197,7 @@ $ cat awkprof.out`
`2195`	`2197`	`}`
`2196`	`2198`
`2197`	`2199`	`{`
`2198`		`- NF++`
`2199`		`- if (FNR == 1) {`
`2200`		`- $NF = "Role"`
`2201`		`- } else {`
`2202`		`- $NF = r[2ドル]`
`2203`		`- }`
	`2200`	`+ $(NF + 1) = (FNR == 1 ? "Role" : r[2ドル])`
`2204`	`2201`	`}`
`2205`	`2202`
`2206`	`2203`	`1 {`
`@@ -2591,7 +2588,7 @@ nums.txt 10062.9`
`2591`	`2588`	`/dev/fd/63 10068.9`
`2592`	`2589`
`2593`	`2590`	`$ # step 4 - correctly initialize variables`
`2594`		`-$ awk 'BEGINFILE{sum=0} {sum += 1ドル} ENDFILE{print FILENAME, sum}' nums.txt <(seq 3)`
	`2591`	`+$ awk '{sum+= 1ドル} ENDFILE{print FILENAME, sum; sum=0}' nums.txt <(seq 3)`
`2595`	`2592`	`nums.txt 10062.9`
`2596`	`2593`	`/dev/fd/63 6`
`2597`	`2594`	```

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