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What are the differences between ArrayList and Vector?
What are the differences between the two data structures ArrayList and Vector , and where should you use each of them?
7...
How can I get query string values in JavaScript?
...essary, one single function to split up the parameters into an associative-array style object is enough. If you're not working with the HTML 5 History API, this is only necessary once per page load. The other suggestions here also fail to decode the URL correctly.
var urlParams;
(window.onpopstate...
What is the difference between typeof and instanceof and when should one be used vs. the other?
...nceof RegExp; // true
typeof /regularexpression/; // object
[] instanceof Array; // true
typeof []; //object
{} instanceof Object; // true
typeof {}; // object
And the last one is a little bit tricky:
typeof null; // object
...
Socket.IO - how do I get a list of connected sockets/clients?
... Socket.IO 0.7 you have a clients method on the namespaces, this returns a array of all connected sockets.
API for no namespace:
var clients = io.sockets.clients();
var clients = io.sockets.clients('room'); // all users from room `room`
For a namespace
var clients = io.of('/chat').clients();
va...
clear javascript console in Google Chrome
...
console.log(new Array(24 + 1).join('\n') does the same thing, but it's much shorter. :)
– nyuszika7h
Feb 2 '11 at 15:08
1...
Store images in a MongoDB database
... store images in a MongoDB database rather than just text? Can I create an array of images in a MongoDB database? Will it be possible to do the same for videos?
...
How to get key names from JSON using jq
...on",
"appname",
"build-date",
"version"
]
UPDATE: To create a BASH array using these keys:
Using BASH 4+:
mapfile -t arr < <(jq -r 'keys[]' ms.json)
On older BASH you can do:
arr=()
while IFS='' read -r line; do
arr+=("$line")
done < <(jq 'keys[]' ms.json)
Then print it...
Why isn't vector a STL container?
...
Does this apply for C++11 std::array<bool> ?
– Sergio Basurco
Dec 4 '15 at 8:06
4
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Is Fortran easier to optimize than C for heavy calculations?
...ounterpart after optimization. Why so? If you write values into the output array, you may change the values of matrix. After all, the pointers could overlap and point to the same chunk of memory (including the int pointer!). The C compiler is forced to reload the four matrix values from memory for a...
Passing parameters to a Bash function
...declare gives you more options and limits variable scope
Want to pass an array to a function?
callingSomeFunction "${someArray[@]}" # Expands to all array elements.
Inside the function, handle the arguments like this.
function callingSomeFunction ()
{
for value in "$@" # You want to use "$...