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What does enctype='multipart/form-data' mean?
...do printf '' | nc -l 8000 localhost; done
Open the HTML on your browser, select the files and click on submit and check the terminal.
nc prints the request received.
Tested on: Ubuntu 14.04.3, nc BSD 1.105, Firefox 40.
multipart/form-data
Firefox sent:
POST / HTTP/1.1
[[ Less interesting hea...
Maximum packet size for a TCP connection
...get the maximum packet size by subtracting the size of the hardware header from that, which is 14 for ethernet with no VLAN.
This is only the case if the MTU is at least that large across the network. TCP may use path MTU discovery to reduce your effective MTU.
The question is, why do you care?
...
Web-scraping JavaScript page with Python
...t: Yay! Supports javascript
Scraping without JS support:
import requests
from bs4 import BeautifulSoup
response = requests.get(my_url)
soup = BeautifulSoup(response.text)
soup.find(id="intro-text")
# Result:
<p id="intro-text">No javascript support</p>
Scraping with JS support:
from...
Converting NSString to NSDate (and back again)
...at to match our input string
// if the format doesn't match you'll get nil from your string, so be careful
dateFormatter.dateFormat = "dd-MM-yyyy"
//`date(from:)` returns an optional so make sure you unwrap when using.
var dateFromString: Date? = dateFormatter.date(from: dateString)
Date to Stri...
ios app maximum memory budget
...
You should watch session 147 from the WWDC 2010 Session videos. It is "Advanced Performance Optimization on iPhone OS, part 2".
There is a lot of good advice on memory optimizations.
Some of the tips are:
Use nested NSAutoReleasePools to make sure you...
What's the best way to check if a file exists in C?
...is question when looking for the reason access() broke in my code. I moved from DevC++ to CodeBlocks and it stopped working. So, it's not infallible; +1 more to @Leffler.
– Ben
Dec 13 '10 at 6:10
...
GCC -fPIC option
...able for inclusion in a library - the library must be able to be relocated from its preferred location in memory to another address, there could be another already loaded library at the address your library prefers.
share
...
NSOperation vs Grand Central Dispatch
...tions and NSOperationQueues with blocks and dispatch queues. This has come from how I've used both technologies in practice, and from the profiling I've performed on them.
First, there is a nontrivial amount of overhead when using NSOperations and NSOperationQueues. These are Cocoa objects, and the...
Configuring Git over SSH to login once
...estion, you first run ssh-keygen to generate a public and private key as Jefromi explained. You put the public key on the server. You should use a passphrase, if you don't you have the equivalent of a plain-text password in your private key. But when you do, then you need as a practical matter ssh-a...
How to show git log history for a sub directory of a git repo?
...
From directory foo/, use
git log -- A
You need the '--' to separate <path>.. from the <since>..<until> refspecs.
# Show changes for src/nvfs
$ git log --oneline -- src/nvfs
d6f6b3b Changes for Mac OS X...