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What is RSS and VSZ in Linux memory management
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RSS is the Resident Set Size and is used to show how much memory is allocated to that process and is in RAM. It does not include memory that is swapped out. It does include memory from shared libraries as long as the pages from those libraries are actually in memory. It does include all st...
Get PHP class property by string
How do I get a property in a PHP based on a string? I'll call it magic . So what is magic ?
12 Answers
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Easy way to test a URL for 404 in PHP?
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If you are using PHP's curl bindings, you can check the error code using curl_getinfo as such:
$handle = curl_init($url);
curl_setopt($handle, CURLOPT_RETURNTRANSFER, TRUE);
/* Get the HTML or whatever is linked in $url. */
$response = cur...
Setting HTTP headers
... "Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
}
// Stop here if its Preflighted OPTIONS request
if req.Method == "OPTIONS" {
return
}
// Lets Gorilla work
s.r.ServeHTTP(rw, req)
}
...
Importing from builtin library when module with same name exists
....5:
import importlib.util
import sys
# For illustrative purposes.
import tokenize
file_path = tokenize.__file__ # returns "/path/to/tokenize.py"
module_name = tokenize.__name__ # returns "tokenize"
spec = importlib.util.spec_from_file_location(module_name, file_path)
module = importlib.util.mod...
What is the difference between “instantiated” and “initialized”?
...ble is initialized with a value. An object is instantiated when memory is allocated for it and it's constructor has been run.
For instance here is a variable:
Dim obj as Object
This variable has not been initialized. Once I assign a value to the obj variable, the variable will be initialized. ...
JavaScript equivalent of PHP's in_array()
... notice you wanted to see if an array was inside another. According to the PHP documentation this is the expected behavior of PHP's in_array:
$a = array(array('p', 'h'), array('p', 'r'), 'o');
if (in_array(array('p', 'h'), $a)) {
echo "'ph' was found\n";
}
if (in_array(array('f', 'i'), $a)) {...
What is the http-header “X-XSS-Protection”?
...was disabled by the user)
X-XSS-Protection: 0 : Disable XSS protection
The token mode=block will prevent browser (IE8+ and Webkit browsers) to render pages (instead of sanitizing) if a potential XSS reflection (= non-persistent) attack is detected.
/!\ Warning, mode=block creates a vulnerability i...
What exactly is OAuth (Open Authorization)?
...code to make sure everything is okay.
Only then facebook will give access token to stackoverflow. Then access token is used by stackoverflow to retrive owner's information without using password. This is the whole motive of oAuth, where acutal credentails in never exposed to third party application...
Is quoting the value of url() really necessary?
... must be escaped with a backslash so that the resulting URI value is a URI token: '\(', '\)'.
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