使用正则表达式的全字匹配 [英] Whole-word matching using regex
问题描述
我想要一个匹配香蕉或睡衣但不是香蕉2或bananaspajamas或香蕉的C ++正则表达式或基本上除了这两个词之外的任何东西。所以我这样做:
I want a C++ regex that matches "bananas" or "pajamas" but not "bananas2" or "bananaspajamas" or "banana" or basically anything besides those exact two words. So I did this:
#include <regex>
int main(int argc, char** argv) {
static const std::regex bp = std::regex("\bbananas\b|\bpajamas\b");
printf("%d\n", std::regex_match("bananas", bp));
}
是什么赋予了? /\bbananas\b|\bpajamas\b/.test('bananas')
给我 true
在JavaScript中,C ++有什么不同?
Except it printed 0! What gives? /\bbananas\b|\bpajamas\b/.test('bananas')
gives me true
in Javascript so what's different about C++?
推荐答案
正则表达式字符串应该有 \bbananas\b | \bpajamas\b
。但在c ++中,\bbananas\b | \bpajamas\b
返回 bbananasb | bpajamasb
。因此,您必须使用 \
与 \
如\ \bbananas\\b | \\bpajamas\\b
Regex string should have \bbananas\b|\bpajamas\b
. but in c++, "\bbananas\b|\bpajamas\b"
return bbananasb|bpajamasb
. for this reason, you have to use extra \
with \
like "\\bbananas\\b|\\bpajamas\\b"
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