[英]Regex pattern to replace the wrong placeholders with blank
I want to replace a String which contains of placeholders which should only consists on digit.我想替换一个包含占位符的字符串,该占位符应该只包含数字。
For ex - this is the test string {0} with correct placeholder {1}.
例如 -
this is the test string {0} with correct placeholder {1}.
Valid placeholders - {digits}有效占位符 - {digits}
Invalid Placeholders - alphanumeric, empty, digit with whitespace, character with whitespace无效的占位符 - 字母数字、空、带空格的数字、带空格的字符
Can anyone help me with a regex.任何人都可以帮助我使用正则表达式。 I tried this but its not working -
我试过这个,但它不起作用 -
\{((([^0-9]).+?)|(.([^0-9])+?))\}
Thank in advance!预先感谢!
You can use您可以使用
\{(?!\d+\})[^{}]*\}
See the regex demo查看正则表达式演示
Details细节
\\{
- a {
char \\{
- 一个{
字符(?!\\d+\\})
- a negative lookahead that fails the match if there are 1 or more digits and then a }
char immediately to the right of the current location (?!\\d+\\})
- 如果有 1 个或多个数字,则匹配失败的负前瞻,然后在当前位置的右侧有一个}
字符[^{}]*
- 0 or more chars other than {
and }
[^{}]*
- 除{
和}
之外的 0 个或多个字符\\}
- a }
char. \\}
- 一个}
字符。
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