javascript javascript未终止字符类
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javascript unterminated character class
提问by davej
var badCode = "\(INST1,\[0,";
var regex = new RegExp(badCode, "igm");
gets "unterminated character class" error.
得到“未终止的字符类”错误。
How to fix?
怎么修？
TIA
TIA
trying suggestions from responders to this post, please see the following screen prints (you might have to right-click on images and open in new tab to make legible):
note values of new_bad_thing (equiv of badCode above)
尝试响应者对此帖子的建议，请查看以下屏幕打印（您可能需要右键单击图像并在新选项卡中打开以使其清晰可见）：注意 new_bad_thing 的值（相当于上面的 badCode）
and here is the screen print when I hit the run button (please note the error message):
这是我点击运行按钮时的屏幕打印（请注意错误消息）：
回答by Ofer Zelig
Put another backslash at badCode:
将另一个反斜杠放在badCode：
var badCode = "\(INST1,\[0,";
var regex = new RegExp(badCode, "igm");
since you need one to escape (inside the regex itself (signal it that it's a literal parentheis) and one escape for javascript.
因为你需要一个(在正则表达式内部转义（表明它是一个文字括号）和一个用于 javascript 的转义。
回答by Ry-
No, it gets "unterminated parenthetical", because you've forgotten to escape the backslash. Why not use a regular expression literal?
不，它会变成“未终止的括号”，因为您忘记了转义反斜杠。为什么不使用正则表达式文字？
var regex = /\(INST1,\[0,/igm;
