用特定内容替换自定义括号
我试图将{all-content} ^ {^}替换为 hat {all-content} 。 字符串和预期的输出应该像...
|---------------------|-------------------|-------------------|
| String Input | Expected Result | What I get |
|---------------------|-------------------|-------------------|
| {A}^{^} | hat{A} | hat{A} |
|---------------------|-------------------|-------------------|
| {{A}_{22}}^{^} | hat{{A}_{22}} | hat{{A}_{22}} |
|---------------------|-------------------|-------------------|
| {A}_{X-1} {B+2}^{^} |{A}_{X-1} hat{B+2}|hat{A}_{X-1} {B+2}|
|---------------------|-------------------|-------------------|
| {A+{B}^{^}}^{^} | hat{A+hat{B}} | hat{A+{B}}^{^} |
|---------------------|-------------------|-------------------|
这是正则表达式..
str = str.replace(/{(.*?)}^{^}/g, "hat{$1}")
str = '{A}^{^} this is sample content {{A}_{22}}^{^} with more complex structure {A}_{X-1} {B+2}^{^} another content with multi level content {A+{B}^{^}}^{^}';
str = str.replace(/{(.*?)}^{^}/g, "hat{$1}");
console.log(str)
试试这个代码,并不完美,因为它假定每个匹配包含相同数量的^{^}
和{
但应该在大多数情况下工作:
let re = /{.*?}[^s]+/g;
let text = "{A}^{^} this is sample content {{A}_{22}}^{^} with more complex structure {A}_{X-1} {B+2}^{^} another content with multi level content {A+{B}^{^}}^{^}";
text.match(re).map(m => {
let replacement = m;
replacement = replacement.replace(/^{^}/g, "");
replacement = replacement.replace(/{/g, "hat{");
text = text.replace(m, replacement);
});
console.log(text);
如果我正确地理解你的问题,那就是懒惰的量词不是在正确的方向上懒散。
在字符串{A}_{X-1} {B+2}^{^}
您想要抓住{A} _ {X-1} {B + 2} ^ {^},但它会看到起始括号和需要{A} _ {X-1} {B + 2} ^ {^} 。
一种解决方法是禁止{
在字符串中,像这样:
{([^{]*?)}^{^}
或者,如果你想禁止任何空格字符,它也可以工作。
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