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Quickly create a large file on a Linux system
How can I quickly create a large file on a Linux ( Red Hat Linux ) system?
14 Answers
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How to colorize diff on the command line?
...ordiff. It's a wrapper around diff that produces the same output as diff, except that it augments the output using colored syntax highlighting to increase readability:
diff old new | colordiff
or just:
colordiff old new
Installation:
Ubuntu/Debian: sudo apt-get install colordiff
OS X: brew...
Ruby: Can I write multi-line string with no concatenation?
...r that helped me get what I needed (easy multi-line concatenation WITHOUT extra whitespace), but since none of the actual answers had it, I'm compiling them here:
str = 'this is a multi-line string'\
' using implicit concatenation'\
' to prevent spare \n\'s'
=> "this is a multi-line string ...
Tab Vs Space preferences in Vim
...hitespace to be inserted when you press the Tab key in insert mode. If expandtab is on, the tab key inserts softtabstop number of space characters. Whereas with expandtab switched off, pressing the Tab key inserts a the smallest possible number of tab+space characters that matches softtab...
How can jQuery deferred be used?
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The best use case I can think of is in caching AJAX responses. Here's a modified example from Rebecca Murphey's intro post on the topic:
var cache = {};
function getData( val ){
// return either the cached value or jqXHR object wrapped Promise
return $.when(
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Why does [5,6,8,7][1,2] = 8 in JavaScript?
... + — array subscript access operation,
where index is `1,2,3`,
which is an expression that evaluates to `3`.
The second [...] cannot be an array, so it’s an array subscript operation. And the contents of a subscript operation are not a delimited list...
What does “The APR based Apache Tomcat Native library was not found” mean?
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It means exactly what it says: "The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path"
The library referred to is bundled into an OS specific dll ...
What does status=canceled for a resource mean in Chrome Developer Tools?
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TypeScript type signatures for functions with variable argument counts
...pt variable amounts of arguments. Take the following object literal as an example:
3 Answers
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Programmatically change log level in Log4j2
...apache.logging.log4j.core.config.Configurator;
Configurator.setLevel("com.example.Foo", Level.DEBUG);
// You can also set the root logger:
Configurator.setRootLevel(Level.DEBUG);
Source
EDITED to reflect changes in the API introduced in Log4j2 version 2.0.2
If you wish to change the root logger...