cmd

问题 I had a problem with set not working in a batch file; it took a while to distil the problem; at first I thought it was to do with subroutine calls... The script @echo off setlocal set a=aaa echo a = "%a%" ( set b=bbb echo b = "%b%" ) produces the output a = "aaa" b = "" whereas I'd expect a = "aaa" b = "bbb" Why is this please? Is it a bug in DOS? Perhaps there's something about the (...) command grouping syntax that I'm unaware of. Thanks. 回答1: User delayed expansion and ! instead of % @echo

问题 I had a problem with set not working in a batch file; it took a while to distil the problem; at first I thought it was to do with subroutine calls... The script @echo off setlocal set a=aaa echo a = "%a%" ( set b=bbb echo b = "%b%" ) produces the output a = "aaa" b = "" whereas I'd expect a = "aaa" b = "bbb" Why is this please? Is it a bug in DOS? Perhaps there's something about the (...) command grouping syntax that I'm unaware of. Thanks. 回答1: User delayed expansion and ! instead of % @echo

问题 I had a problem with set not working in a batch file; it took a while to distil the problem; at first I thought it was to do with subroutine calls... The script @echo off setlocal set a=aaa echo a = "%a%" ( set b=bbb echo b = "%b%" ) produces the output a = "aaa" b = "" whereas I'd expect a = "aaa" b = "bbb" Why is this please? Is it a bug in DOS? Perhaps there's something about the (...) command grouping syntax that I'm unaware of. Thanks. 回答1: User delayed expansion and ! instead of % @echo

问题 I had a problem with set not working in a batch file; it took a while to distil the problem; at first I thought it was to do with subroutine calls... The script @echo off setlocal set a=aaa echo a = "%a%" ( set b=bbb echo b = "%b%" ) produces the output a = "aaa" b = "" whereas I'd expect a = "aaa" b = "bbb" Why is this please? Is it a bug in DOS? Perhaps there's something about the (...) command grouping syntax that I'm unaware of. Thanks. 回答1: User delayed expansion and ! instead of % @echo

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago . Improve this question When application run in windows form it have property called window title . This window title appear in the tab of the application windows. I ask help to get this window title for the application running with command-line. 回答1: This is example how to get the windows title for

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago . Improve this question When application run in windows form it have property called window title . This window title appear in the tab of the application windows. I ask help to get this window title for the application running with command-line. 回答1: This is example how to get the windows title for

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 days ago . Improve this question Suppose a program cook takes one argument: the pathname of a text file containing the recipe of the food to cook. Suppose I wish to call this program from within a batch script, also suppose I already have the recipe in a string variable: set the_recipe = "wash cucumbers" "wash

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 days ago . Improve this question Suppose a program cook takes one argument: the pathname of a text file containing the recipe of the food to cook. Suppose I wish to call this program from within a batch script, also suppose I already have the recipe in a string variable: set the_recipe = "wash cucumbers" "wash

问题 I want to capture all lines which contain exactly 3 fields, where a field is any string (possibly empty) followed by a | (and there may be some final text at the end of the line). I managed to build a regex which seems to do exactly what I want ^(?:[^\|]*\|){3}[^\|]*$ and when I try it on 101regex it seems to work just fine. However, I am having problems to run this regex on the Windows command line via grep and I guess it has something to do with the proper escaping. I tried grep -E '^^(?:[^

问题 I want to capture all lines which contain exactly 3 fields, where a field is any string (possibly empty) followed by a | (and there may be some final text at the end of the line). I managed to build a regex which seems to do exactly what I want ^(?:[^\|]*\|){3}[^\|]*$ and when I try it on 101regex it seems to work just fine. However, I am having problems to run this regex on the Windows command line via grep and I guess it has something to do with the proper escaping. I tried grep -E '^^(?:[^