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How to SSH to a VirtualBox guest externally through a host? [closed]
...Guest port", insert 22. Everything else of the rule can be left blank.
or from the command line
VBoxManage modifyvm myserver --natpf1 "ssh,tcp,,3022,,22"
where 'myserver' is the name of the created VM. Check the added rules:
VBoxManage showvminfo myserver | grep 'Rule'
That's all! Please be s...
XMLHttpRequest status 0 (responseText is empty)
... Why is this being downvoted? It is actually true! XHR requests from file:// URLs of files also on file:// URLs actually have status == 0 on success (tested on FF 24.0.5).
– Daniel Roethlisberger
Dec 31 '14 at 21:20
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What is the difference between indexOf() and search()?
...rgument
str.indexOf('k') // 3
str.indexOf('k',4) // 11 (it start search from 4th position)
special in search()
search value can be regular expression
str.search('book') // 8
str.search(/book/i) // 0 ( /i =case-insensitive (Book == book)
reference
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How to remove an item from an array in AngularJS scope?
...ular, but with Array methods. The proper way to remove a particularly item from an array is with Array.splice. Also, when using ng-repeat, you have access to the special $index property, which is the current index of the array you passed in.
The solution is actually pretty straightforward:
View:
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Single Line Nested For Loops
...ften faster than using a for loop.
Look at this longer list comprehension from the tutorial (the if part filters the comprehension, only parts that pass the if statement are passed into the final part of the list comprehension (here (x,y)):
>>> [(x, y) for x in [1,2,3] for y in [3,1,4] if...
Array vs. Object efficiency in JavaScript
... But I want to know what is performing better: retrieving an object from an array (by looping through it) or from an "associative" object where the id is the key. I'm sorry if my question wasn't clear...
– Moshe Shaham
Jun 25 '13 at 10:57
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How is the java memory pool divided?
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Heap memory
The heap memory is the runtime data area from which the Java VM allocates memory for all class instances and arrays. The heap may be of a fixed or variable size. The garbage collector is an automatic memory management system that reclaims heap memory for objects.
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Array_merge versus + [duplicate]
...d to the left-hand array; for keys that exist in both arrays, the elements from the left-hand array will be used, and the matching elements from the right-hand array will be ignored.
http://php.net/manual/en/language.operators.array.php
array_merge() has slightly different behavior:
If the in...
$(document).ready equivalent without jQuery
...e a script that uses $(document).ready , but it doesn't use anything else from jQuery. I'd like to lighten it up by removing the jQuery dependency.
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How to capture no file for fs.readFileSync()?
...y, fs.readFileSync throws an error when a file is not found. This error is from the Error prototype and thrown using throw, hence the only way to catch is with a try / catch block:
var fileContents;
try {
fileContents = fs.readFileSync('foo.bar');
} catch (err) {
// Here you get the error when ...