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Explain xkcd: It's 'cause you're dumb.
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We have collaboratively explained [[:Category:Comics|'''{{#expr:{{PAGESINCAT:Comics}}-9}}''' xkcd comics]],
 
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({{#expr: ({{LATESTCOMIC}}-({{PAGESINCAT:Comics}}-9)) / ({{PAGESINCAT:Comics}}-9) * 100 round 0}}%)

Revision as of 19:09, 27 February 2013


Welcome to the explain xkcd wiki!

We have collaboratively explained 5 xkcd comics, and only 1680 (33600%) remain. Add yours while there's a chance!

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Go to this comic explanation

Patch
My optimizer uses content-aware inpainting to fill in all the wasted whitespace in the code, repeating the process until it compiles.
Title text: My optimizer uses content-aware inpainting to fill in all the wasted whitespace in the code, repeating the process until it compiles.

Explanation

Adobe Photoshop is a commonly used software for image manipulation. One of its features is "content-aware inpainting", which allows the user to delete parts of the image and seamlessly replacing the deleted sections with "patches" of texture from other parts of the image.

The GNU patch is a software program that replaces only parts of the code with an updated version, without requiring the user to download the entire source code. Here, it appears the author was told to "patch" the code, but used Photoshop to do this instead of GNU patch, with devastating results. Although the title text suggest that if you did this enough times the code would eventually compile, this would never happen... In fact, Photoshop could only edit an image of the text and not the text itself.

The code appears to be written in Python, a programming language often referred to in xkcd.. A few of the function names that can be recognized are "isPrime" and "quicksort", both commonly used in solving programming contest problems.

The title text also explains that patch used the content-aware inpainting to fill in all the wasted whitespace in the code. In Python, whitespaces are used as a part of programming syntax (for example, new line of code are used instead of semicolon (;), and indents are used instead of curly brackets.

Transcript

[The panel displays part of a code, in four different colors (red, light blue, green and purple) as well as normal black text, which due to image editing is difficult to read. The first and last line are partly obscured by the frame of the panel. Here below is an attempt to transcribe the code, using the sign "¤" for anything not easily transcribed. Feel free to add other signs instead of these that looks more like the one in the image (and also improve the attempted transcription if possible).]
impo¤l me
dooPisPS¤me(n):
r(¤n<n,1:
retern F(ise
for i irararre(2, nint *n**n+5)+5):
if n i==0
ret¤¤nrselsel:
re¤ irn True
defesisPrimcieg ¤x(cx
if ge¤inatcx(r'^(1?| ?.1+?)\+)$'*n )1'*n):
rerjrn Fa( e
LetylnrTrl
dql qlsorsorn(a :
if ¤n(a < 2:
eteturn a
pi= =r fa[0]
l=pi=for j ln a i< i<pi<(t]()
r=[l=for f in a) r i>viviv](vo)
mid=[pi[*t]*(l*t,(a)-(lenpienlen(c)))
r¤lrurrriklcksckt(l) + r ¤ ¤quickrort(r)
[Caption below the panel:]
Protip: If you don't have access to the GNU patch tool, you can use the Photoshop one.


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