大约有 30,000 项符合查询结果(耗时:0.0429秒) [XML]

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Is there a way to check if int is legal enum in C#?

...lue, Enum.IsDefined(typeof(PetType), value)); // Call IsDefined with string containing member name. value = "Rodent"; Console.WriteLine("{0}: {1}", value, Enum.IsDefined(typeof(PetType), value)); // Call IsDefined with a variable of type PetType. value = PetType.Dog; ...
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How to throw an exception in C?

...I started similar project with an structure, but uses an uuid instead of a string to identify each "exception". Your project seems very promising. – umlcat Aug 21 '19 at 22:48 ...
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How do you round a float to two decimal places in jruby

...ason, see comments), so that is the better solution if you are looking for string output. – Dylan Vander Berg Aug 6 '17 at 4:33 ...
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Painless way to install a new version of R?

...I have to adjust the Rprofile.site anyway (using sum contrasts, adding the extra code for Tinn-R, these things), so it's not really extra work. It just takes extra time installing all packages anew. This last bit is equivalent to what is given in the original question as a solution. I just don't ne...
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Null coalescing in powershell

...alpha', 5, 0, '', @(), $null, $true, $false $instances = $items -ne $null [string]::Join(', ', ($instances | ForEach-Object -Process { $_.GetType() })) # Result: System.String, System.Int32, System.Int32, System.String, System.Object[], System.Boolean, System.Boolean -eq works similarly, which is...
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Is there any way to specify a suggested filename when using data: URI?

... var link = document.createElement('a'); if (typeof link.download === 'string') { link.href = uri; link.download = filename; //Firefox requires the link to be in the body document.body.appendChild(link); //simulate click link.click(); //remove the lin...
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What is the best Java email address validation method? [closed]

... email package is the easiest: public static boolean isValidEmailAddress(String email) { boolean result = true; try { InternetAddress emailAddr = new InternetAddress(email); emailAddr.validate(); } catch (AddressException ex) { result = false; } return result; } ...
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How to configure socket connect timeout

... timeout.</param> public static void Connect(this Socket socket, string host, int port, TimeSpan timeout) { AsyncConnect(socket, (s, a, o) => s.BeginConnect(host, port, a, o), timeout); } /// <summary> /// Connects the specified socket. /// </summar...
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Difference between Static and final?

...dard library classes are final, for example java.lang.System and java.lang.String. All methods in a final class are implicitly final. A final method can't be overridden by subclasses. This is used to prevent unexpected behavior from a subclass altering a method that may be crucial to the function or...
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Why doesn't height: 100% work to expand divs to the screen height?

... I don't see any benefit to this at all. Doesn't it create extra work for the browser which needs to calculate everything related to the browser viewport? Viewport sizing only seems beneficial when you want to actually size something related to the browser height. ...