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Ruby: kind_of? vs. instance_of? vs. is_a?
...erson.is_an? Administrator :)... That might have made it into Ruby core by now, actually.
– rfunduk
Oct 8 '10 at 19:18
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What is the difference between a schema and a table and a database?
...grant rights on the schema.
In 2000 a schema was equivalent to a user. Now it has broken free and is quite useful. You could throw all your user procs in a certain schema and your admin procs in another. Grant EXECUTE to the appropriate user/role and you're through with granting EXECUTE on spec...
What is the difference between .map, .every, and .forEach?
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.forEach() returns nothing is wrong now, maybe it wasnt in 2012 but in 2015 in Chrome at least, try this arr2 = ['sue', 'joe', 'ben', 'guy', 'tom', 'jon']; b = arr2.forEach( function(el, indx) { console.log(indx + ' : ' + el); }); console.log(b);
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Copy constructor versus Clone()
...ow clone, thus the interface is semantically broken as your callers won't know whether the call will deep or shallow clone the object.
Instead, you should define your own IDeepCloneable (and IShallowCloneable) interfaces with DeepClone() (and ShallowClone()) methods.
You can define two interfaces,...
Cookies vs. sessions
...than simplicity. Look at it this way... Does the user have any reason to know their ID#? Typically I would say no, the user has no need for this information. Giving out information should be limited on a need to know basis. What if the user changes his cookie to have a different ID, how will you...
Django Cookies, how can I set them?
...n a location
the visitor chooses. e.g: User enters in 55812 as the zip. I know what
city and area lat/long. that is and give them their content pertinent
to that area. My question is how can I store this in a cookie so that
when they return they are not required to always enter their zip code?
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log all queries that mongoose fire in the application
... have application using nodejs and mongodb. I have used mongoose for ODM.
Now i want to log all the queries that mongoose fire during the whole application.
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Is there anyway to exclude artifacts inherited from a parent POM?
...;/project>
Your child-project inherits this parent-pom as before. But now, the mail dependency can be excluded in the child-project within the dependencyManagement block:
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>test</groupId>
<artifact...
How can I change property names when serializing with Json.net?
I have some data in a C# DataSet object. I can serialize it right now using a Json.net converter like this
3 Answers
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Open Graph namespace declaration: HTML with XMLNS or head prefix?
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Nothing will break right now, but relying on defaults is rarely a good idea when you can be explicit. If 2 years down the road we change the defaults, your site will break. Also, if you declare your namespaces directly it will help other parsers not ...