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Dynamically Changing log4j log level

What are the different approaches for changing the log4j log level dynamically, so that I will not have to redeploy the application. Will the changes be permanent in those cases? ...
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How to write to a file in Scala?

...re the main entry points into the Scala IO File API. import scalax.io._ val output:Output = Resource.fromFile("someFile") // Note: each write will open a new connection to file and // each write is executed at the begining of the file, // so in this case the last write will be th...
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How to convert an int value to string in Go?

... @Boon In visible impact to your app? As always - it depends. Another object means one more object, beyond the obvious temporary small memory hit, needs to be garbage collected. If you are calling the function at high rates, for example as part of some seri...
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SyntaxError: Non-ASCII character '\xa3' in file when function returns '£'

... or use the magic available since Python 2.6 to make it automatic: from __future__ import unicode_literals share | improve this answer | follow | ...
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How do I send a JSON string in a POST request in Go

..., resp.Status) fmt.Println("response Headers:", resp.Header) body, _ := ioutil.ReadAll(resp.Body) fmt.Println("response Body:", string(body)) } share | improve this answer | ...
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Turn a string into a valid filename?

...n has been moved to django/utils/text.py, and that file also contains a get_valid_filename function. – Denilson Sá Maia Dec 3 '13 at 21:39 ...
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Fastest Way to Serve a File Using PHP

...he web server to do it. The basic php code is : header("X-Sendfile: $file_name"); header("Content-type: application/octet-stream"); header('Content-Disposition: attachment; filename="' . basename($file_name) . '"'); Where $file_name is the full path on the file system. The main problem with thi...
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Replace new lines with a comma delimiter with Notepad++?

... If there are trailing spaces on the line you might for _*[\r\n]+. To deal with the blank lines turned into excess commas you could do a regular expression search for ,_[,_]+ and replace with ,_. Alternatively, the TextFx package has a delete blanks lines command that can be used ...
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@UniqueConstraint annotation in Java

... @Entity @Table(uniqueConstraints={@UniqueConstraint(columnNames = {"id_1" , "id_2"})}) public class class_name { @Id @GeneratedValue public Long id; @NotNull public Long id_1; @NotNull public Long id_2; } Hope it helped. ...
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Why does changing the returned variable in a finally block not change the return value?

...iable 5: getstatic #8; //loading "dev" from a static variable 8: astore_0 //storing "dev" to a temp variable 9: ldc #9; //loading String "override variable s" 11: putstatic #8; //setting a static variable 14: aload_0 //loading a temp avariable 15: areturn //retu...