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Maximum packet size for a TCP connection
...
The absolute limitation on TCP packet size is 64K (65535 bytes), but in practicality this is far larger than the size of any packet you will see, because the lower layers (e.g. ethernet) have lower packet sizes.
The MTU (Maximum Transmission Unit) for Ethernet, for instance, is 15...
Static class initializer in PHP
...
Sounds like you'd be better served by a singleton rather than a bunch of static methods
class Singleton
{
/**
*
* @var Singleton
*/
private static $instance;
private function __construct()
{
// Your "heavy" initialization stuff here
}...
How to toggle a value in Python
...>> x
1
The technique generalizes to any pair of integers. The xor-by-one step is replaced with a xor-by-precomputed-constant:
>>> A = 205
>>> B = -117
>>> t = A ^ B # precomputed toggle constant
>>> x = A
>>> x ^= t # toggle
>...
Handle file download from ajax post
... // IE workaround for "HTML7007: One or more blob URLs were revoked by closing the blob for which they were created. These URLs will no longer resolve as the data backing the URL has been freed."
window.navigator.msSaveBlob(blob, filename);
} else {
var URL = w...
How can I pass a list as a command-line argument with argparse?
...nd the end result.
import argparse
parser = argparse.ArgumentParser()
# By default it will fail with multiple arguments.
parser.add_argument('--default')
# Telling the type to be a list will also fail for multiple arguments,
# but give incorrect results for a single argument.
parser.add_argument...
What's the difference between ngModel.$modelValue and ngModel.$viewValue
...t; component, where viewValue contains FileList object with files attached by the user. The Angular docs are confusing about this right now and should be updated.
– demisx
Feb 23 '15 at 17:59
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Cancel/kill window.setTimeout() before it happens
...StatusIndicator()' is a function, you can gain performance (and type less) by simply: var timer1 = setTimeout(removeStatusIndicator, statusTimeout); This avoids the nested function calls.
– HarleyDave
Aug 29 '14 at 11:25
...
Renaming table in rails
...d::ConnectionAdapters::SchemaStatements isn't even a class (as pointed out by cam), which means that you can't even create an instance of it as per what I said above. And even if you used cam's example of class Foo; include ActiveRecord::ConnectionAdapters::SchemaStatements; def bar; rename_table; e...
Generating random strings with T-SQL
...nced the random seed. I updated the code, and also fixed the mentioned off-by-one issue.
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Futures vs. Promises
...the two separate sides of an asynchronous operation.
std::promise is used by the "producer/writer" of the asynchronous operation.
std::future is used by the "consumer/reader" of the asynchronous operation.
The reason it is separated into these two separate "interfaces" is to hide the "write/set" ...