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How can I find and delete lines which start with the text in?
I use the command C-M-s ^in to find all lines starting with in, but then I don't really know what to do.
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Move your cursor directly before the region you want to delete. Set a mark by pressing Ctrl-6 or Ctrl-^ . Move the cursor to the end of the region you want to delete and press Ctrl-k .
Delete lines or connectorsClick the line, connector, or shape that you want to delete, and then press Delete. Tip: If you want to delete multiple lines or connectors, select the first line, press and hold Ctrl while you select the other lines, and then press Delete.
Emacs provides many ways to delete text. The simplest way to delete text is to press the DEL key, which deletes the character immediately to the left of the cursor. See Figure 2-3 for possible locations of the DEL key on your keyboard. DEL is easiest to define by what it does: it deletes the previous character.
M-x flush-lines RET ^in RET
C-h f flush-lines tells you:
flush-linesis an interactive compiled Lisp function inreplace.el.It is bound to
menu-bar edit flush-lines.
(flush-lines REGEXP &optional RSTART REND INTERACTIVE)Delete lines containing matches for
REGEXP.When called from Lisp (and usually when called interactively as well, see below), applies to the part of the buffer after point. The line point is in is deleted if and only if it contains a match for regexp starting after point.
If
REGEXPcontains upper case characters (excluding those preceded by\) andsearch-upper-caseis non-nil, the matching is case-sensitive.Second and third arg
RSTARTandRENDspecify the region to operate on. Lines partially contained in this region are deleted if and only if they contain a match entirely contained in it.Interactively, in Transient Mark mode when the mark is active, operate on the contents of the region. Otherwise, operate from point to the end of (the accessible portion of) the buffer. When calling this function from Lisp, you can pretend that it was called interactively by passing a non-nil
INTERACTIVEargument.If a match is split across lines, all the lines it lies in are deleted. They are deleted before looking for the next match. Hence, a match starting on the same line at which another match ended is ignored.
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query-replace-regexp "in.*" to "" will be work. you should not input " to the prompt
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