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How to Correctly Use Lists in R?

... Regarding your questions, let me address them in order and give some examples: 1) A list is returned if and when the return statement adds one. Consider R> retList <- function() return(list(1,2,3,4)); class(retList()) [1] "list" R> notList <- function() re...
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Why is Cache-Control attribute sent in request header (client to server)?

... A client can send a Cache-Control header in a request in order to request specific caching behavior, such as revalidation, from the origin server and any intermediate proxy servers along the request path. s...
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Error in Swift class: Property not initialized at super.init call

...erclass initializer. Now, the two phase initialization never talks about order, but this safety check, introduces super.init to be ordered, after the initialization of all the properties. Safety check 1 might seem irrelevant as, Two-phase initialization prevents property values from being access...
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Does MySQL index foreign key columns automatically?

... where the foreign key columns are listed as the first columns in the same order. Such an index is created on the referencing table automatically if it does not exist. (This is in contrast to some older versions, in which indexes had to be created explicitly or the creation of foreign key constraint...
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Apache: client denied by server configuration

...: Require all granted as in <Directory "your directory here"> Order allow,deny Allow from all # New directive needed in Apache 2.4.3: Require all granted </Directory> share | ...
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Pure JavaScript equivalent of jQuery's $.ready() - how to call a function when the page/DOM is ready

...ent loop finishes so all handlers will still execute // in order and no new ones will be added to the readyList // while we are processing the list readyList[i].fn.call(window, readyList[i].ctx); } // allow any closures held by ...
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IE 8: background-size fix [duplicate]

... I use the filter solution above, for ie8. However.. In order to solve the freezing links problem , do also the following: background: no-repeat center center fixed\0/; /* IE8 HACK */ This has solved the frozen links problem for me. ...
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How can we redirect a Java program console output to multiple files?

... It seems that you also need to close with System.out.flush() in order to avoid possibly missing some output. – Robert Tupelo-Schneck Mar 30 '15 at 15:23 add a comme...
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Why do we need RESTful Web Services?

...ameters in URIs. And large amounts of data, like that in detailed purchase orders, can quickly become cumbersome or even out of bounds within a URI. In these cases, SOAP is indeed a solid solution. But it's important to try REST first and resort to SOAP only when necessary. This helps keep applicati...
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How to unit test a Node.js module that requires other modules and how to mock the global require fun

... while you are testing it. This means you need no changes to your code in order to inject mocks for required modules. Proxyquire has a very simple api which allows resolving the module you are trying to test and pass along mocks/stubs for its required modules in one simple step. @Raynos is right ...