59 lines
1.5 KiB
HTML
59 lines
1.5 KiB
HTML
<h2>Comments</h2>
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<pre><code>// Single line comment
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/// Documentation single line comment
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/* Block comment
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on several lines */
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/** Multi-line
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doc comment */</code></pre>
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<h2>Annotations</h2>
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<pre><code>@todo('seth', 'make this do something')
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@deprecated // Metadata; makes Dart Editor warn about using activate().</code></pre>
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<h2>Numbers</h2>
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<pre><code>var x = 1;
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var hex = 0xDEADBEEF;
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var bigInt = 346534658346524376592384765923749587398457294759347029438709349347;
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var y = 1.1;
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var exponents = 1.42e5;
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</code></pre>
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<h2>Strings</h2>
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<pre><code>var s1 = 'Single quotes work well for string literals.';
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var s2 = "Double quotes work just as well.";
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var s3 = 'It\'s easy to escape the string delimiter.';
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var s4 = "It's even easier to just use the other string delimiter.";
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var s1 = '''
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You can create
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multi-line strings like this one.
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''';
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var s2 = """This is also a
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multi-line string.""";
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var s = r"In a raw string, even \n isn't special.";</code></pre>
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<h2>Full example</h2>
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<pre><code>class Logger {
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final String name;
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bool mute = false;
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// _cache is library-private, thanks to the _ in front of its name.
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static final Map<String, Logger> _cache = <String, Logger>{};
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factory Logger(String name) {
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if (_cache.containsKey(name)) {
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return _cache[name];
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} else {
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final logger = new Logger._internal(name);
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_cache[name] = logger;
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return logger;
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}
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}
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Logger._internal(this.name);
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void log(String msg) {
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if (!mute) {
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print(msg);
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}
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}
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}</code></pre> |