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Tool to read and display Java .class versions

Do any of you know of a tool that will search for .class files and then display their compiled versions? 9 Answers ...
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How to get the IP address of the docker host from inside a docker container

... title says. I need to be able to retrieve the IP address the docker hosts and the portmaps from the host to the container, and doing that inside of the container. ...
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What does -D_XOPEN_SOURCE do/mean?

...nclude definitions for some extra functions that are defined in the X/Open and POSIX standards. This will give you some extra functionality that exists on most recent UNIX/BSD/Linux systems, but probably doesn't exist on other systems such as Windows. The numbers refer to different versions of the...
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How can I do SELECT UNIQUE with LINQ?

...idn't achieve an alphabetic sort - for some reason... I switched ascending and descending and got the same result. Is the distinct statement affecting it? maybe it needs to be orderedby after that ? – baron Aug 19 '10 at 7:06 ...
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PHP 5.4 Call-time pass-by-reference - Easy fix available?

... I had this used in the old code for an object called event (&$event), and had to remove the ampersand for the error message to disappear. – Natalia Nov 16 '13 at 17:21 1 ...
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Rails: how do I validate that something is a boolean?

...ield (the field would not be valid for a false value). But in both Rails 3 and 4, having validates :field, inclusion: [true, false] would test for inclusion in a list of values, with the side-effect to test for the field's presence (unless one of those values is nil of course). ...
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Using column alias in WHERE clause of MySQL query produces an error

...an only use column aliases in GROUP BY, ORDER BY, or HAVING clauses. Standard SQL doesn't allow you to refer to a column alias in a WHERE clause. This restriction is imposed because when the WHERE code is executed, the column value may not yet be determined. Copied from MySQL documen...
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Simple way to repeat a String in java

...te this using a for loop, but I wish to avoid for loops whenever necessary and a simple direct method should exist somewhere. ...
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jQuery posting JSON

... @FMM and Jonas N - Can you guys help me figure out how to update my answer for correctness? The examples in the jQuery docs (here: api.jquery.com/jQuery.post) make it appear as though you can post either a JS object or a string, ...
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Simplest way to check if key exists in object using CoffeeScript

... to JavaScript's key in obj. (CoffeeScript uses of when referring to keys, and in when referring to array values: val in arr will test whether val is in arr.) thejh's answer is correct if you want to ignore the object's prototype. Jimmy's answer is correct if you want to ignore keys with a null or ...