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Regular expression to match DNS hostname or IP Address?
... expressions separately or by combining them in a joint OR expression.
ValidIpAddressRegex = "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$";
ValidHostnameRegex = "^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za...
in entity framework code first, how to use KeyAttribute on multiple columns
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InvalidOperationException: Entity type 'XXX' has composite primary key defined with data annotations. To set composite primary key, use fluent API.
– Luca Ziegler
Nov 17 '19 at 18:07
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argparse store false if unspecified
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I didn't understand the contrarian naming convention.
– brainLoop
Jul 16 '19 at 9:04
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Escape double quotes in a string
...iterals as you have, or escape the " using backslash.
string test = "He said to me, \"Hello World\" . How are you?";
The string has not changed in either case - there is a single escaped " in it. This is just a way to tell C# that the character is part of the string and not a string terminator.
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Forms authentication timeout vs sessionState timeout
...e amount of time in minutes that the authentication cookie is set to be valid, meaning, that after value number of minutes, the cookie will expire and the user will no longer be authenticated—they will be redirected to the login page automatically. The slidingExpiration=true value is basically say...
iPhone OS: How do I create an NSDate for a specific date?
... using the "dateFromString" function - I found that with some perfectly-valid dates, it'd fail miserably. See my post below for an alternative way of parsing date strings.
– Mike Gledhill
Jul 18 '13 at 14:19
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How to “pull” from a local branch into another one?
...e, just like merge, scenarios might arise where git can't automatically decide the correct outcome of "merging" two sets of changes. Regarding the point you made about a "cleaner" commit history. Personally, my preference is to maintain all commit history, just in case I ever need to do some "commit...
emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
Does setWidth(int pixels) use dip or px?
Does setWidth(int pixels) use device independent pixel or physical pixel as unit?
For example, does setWidth(100) set the a view's width to 100 dips or 100 pxs?
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What is the Swift equivalent of isEqualToString in Objective-C?
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=== is identity operators whereas == is equality operator (by default call isEqual: on NSObject and its subclasses)
– Bryan Chen
Jun 7 '14 at 11:42
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