Ken Thompson, perhaps one of the most well-known computer scientists of all time, created the grandfather of all regex algorithms in 1968, inspired by Brzozowski’s work, but only included OR (|) as a boolean operator. and somewhere in the process also changed the meaning of union to alternation by always choosing the left branch when both branches could match, but let’s skip ahead, we got plenty more tangents to avoid here.
每年正月十五晚上，大人小孩会去村后河套地里，堤上堤下都是人。堤下的抡火球，堤上的看风景。高粱苗点燃以后，碎星星一样挤眼睛，不生明火。一端拴上绳子，扬起手臂朝空中抡，火星遇到空气哔哔剥剥作响。圆的直径与绳子长短有关，也与臂力大小有关。一河滩的火球把半个天空都照亮了，既好看又好玩。
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Dramatic scenes are key to the genre's appeal