Version 0.5.0: pick, Zeilen auf dem Terminal wählen

demo/testall.cmds

@@ -265,3 +265,16 @@ bom ; cat bom
 ## update.inv: change the stock of one item, with record locking (INV names the table)
 cp inventory inv ; printf '7\n9\n\n' | INV=inv update.inv | tail -n +2
 grep '^7' inv
+
+## ===== Choosing rows on the terminal =====
+## pick shows a table, lets you scroll, filter (/) and mark rows (Space, -m), and writes the
+## chosen rows as a table, so it can sit in a pipe. It needs a terminal; -k feeds the keys instead.
+## Try it:  pick -m < inventory | total Amount Value
+## mark the 2nd and 5th row (down, space, down, down, space) and finish with enter
+pick -m -k 'down space down down space enter' < inventory
+## the same chosen rows go on into total
+pick -m -k 'down space down down space enter' < inventory | total Amount Value
+## filter with / (type, enter), then choose the row that is left
+pick -k '/clamps enter enter' < inventory
+## Esc cancels: nothing on stdout, exit status 1
+pick -k esc < inventory ; echo "status $?"

demo/testall.old

@@ -845,9 +845,9 @@ Item   Amount   Cost     Value     Description
 ## tabletom4 / tabletosed / tabletostruct were shown above
 ## ===== Help and the terminal =====
 $ rdb --version
-rdb 0.4.0
+rdb 0.5.0
 $ howmany
-135
+136
 $ whatis row
    row       - make a new table where rows match logical condition
    row       row 'column condition column-or-value ..' < table
@@ -1107,3 +1107,27 @@ Item Number: (or hit Return key to exit.) Item=7  Amount=5  Cost=175.00  Value=8
 Amount Amount: Item Number: (or hit Return key to exit.) 
 $ grep '^7' inv
 7	9	175.00	1575	scales  
+## ===== Choosing rows on the terminal =====
+## pick shows a table, lets you scroll, filter (/) and mark rows (Space, -m), and writes the
+## chosen rows as a table, so it can sit in a pipe. It needs a terminal; -k feeds the keys instead.
+## Try it:  pick -m < inventory | total Amount Value
+## mark the 2nd and 5th row (down, space, down, down, space) and finish with enter
+$ pick -m -k 'down space down down space enter' < inventory
+Item	Amount	Cost	Value	Description
+----	------	----	-----	-----------
+2	100	0.50	50.00	test tubes
+5	99	2.45	242.55	cleaning cloth
+## the same chosen rows go on into total
+$ pick -m -k 'down space down down space enter' < inventory | total Amount Value
+Item	Amount	Cost	Value	Description
+----	------	----	-----	-----------
+	199		292.55	
+## filter with / (type, enter), then choose the row that is left
+$ pick -k '/clamps enter enter' < inventory
+Item	Amount	Cost	Value	Description
+----	------	----	-----	-----------
+3	6	8.00	48.00	clamps
+## Esc cancels: nothing on stdout, exit status 1
+$ pick -k esc < inventory ; echo "status $?"
+pick: nothing chosen
+status 1