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'((A 0) (K 1) (E 1) (H 2) (I 2) (G 2) '3 (NIL 3) (J 3) (J 3) '4 (NIL 4) '4 (NIL 4)))
如何从列表中删除'3和?'4
'3
'4
在 Lisp 中
只是简写
(quote 3)
所以你需要使用remove-if传递一个谓词函数来检查被传递的元素是否是两个元素的列表,其中第一个元素是符号quote。
remove-if
quote
当光标悬停在 HTML5 画布上的图像上时标记
I have the page with YouTube video (object - not iframe) and need to add the image over it. All works fine in Chrome, but in IE the image is below the YouTube player. So I searched for the info and