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do { … } while (0) — what is it good for? [duplicate]
..., you don't get to choose how other people are going to use your macro. In order to avoid unexpected surprises inflicted upon your users, you have to use a technique like the above to make your macro behave as any other C statement would behave.
– Greg Hewgill
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enum.values() - is an order of returned enums deterministic
...e:
@return an array containing the constants of this enum type, in the order they're declared [Source]
So, yes, they will be returned in declaration order. It's worth noting that the order might change over time if someone changes the class so be very careful about how you use this.
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How to check whether an object is a date?
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In order to check if the value is a valid type of the standard JS-date object, you can make use of this predicate:
function isValidDate(date) {
return date && Object.prototype.toString.call(date) === "[object Date]" &...
Only read selected columns
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Meaning of “[: too many arguments” error from if [] (square brackets)
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Why does Java's hashCode() in String use 31 as a multiplier?
...cation to be key.hashCode() ^ value.hashCode() despite it is not even an unordered pair, as key and value have entirely different meaning. Yes, that implies that Map.of(42, 42).hashCode() or Map.of("foo", "foo", "bar", "bar").hashCode(), etc, are predictably zero. So don’t use maps as keys for oth...
Unique random string generation
...ose from the entire allowedCharSet, ignore
// the value in order to avoid biasing the result.
var outOfRangeStart = byteSize - (byteSize % allowedCharSet.Length);
if (outOfRangeStart <= buf[i]) continue;
result.Append(allowedCharSet[...
PHP Session Security
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There are a couple of things to do in order to keep your session secure:
Use SSL when authenticating users or performing sensitive operations.
Regenerate the session id whenever the security level changes (such as logging in). You can even regenerate the sessio...
Can't find Request.GetOwinContext
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You may need to add the NuGet package Microsoft.Owin.Host.SystemWeb in order to do this:
HttpContext.Current.GetOwinContext().GetUserManager<ApplicationUserManager>();
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jQuery $(document).ready and UpdatePanels?
...n the page. You shouldn't need to do anything other than the code above in order to use it as long as the UpdatePanel is on the page.
If you need more detailed control, this event passes arguments similar to how .NET events are passed arguments (sender, eventArgs) so you can see what raised the eve...