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function parseTitle(entry) {
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return /^#[ \t]+(.+)$/m.exec(entry)?.[1];
}
parseTitle("# Hello world"); // "Hello world"
parseTitle("## Subsection"); // undefined
parseTitle(`
---
slug: Web/JavaScript/Reference/Regular_expressions/Wildcard
---
# Wildcard: .
A **wildcard** matches all characters except line terminators.
`); // "Wildcard: ."
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function parseCodeBlock(entry) {
return /^```.*?^(.+?)\n```/ms.exec(entry)?.[1];
}
parseCodeBlock(`
\`\`\`js
console.log("Hello world");
\`\`\`
`); // "console.log("Hello world");"
parseCodeBlock(`
A \`try...catch\` statement must have the blocks enclosed in curly braces.
\`\`\`js-nolint example-bad
try
doSomething();
catch (e)
console.log(e);
\`\`\`
`); // "try\n doSomething();\ncatch (e)\n console.log(e);"
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