fay59

Here's a list of mildly interesting things about the C language that I learned mostly by consuming Clang's ASTs. Although surprises are getting sparser, I might continue to update this document over time.

There are many more mildly interesting features of C++, but the language is literally known for being weird, whereas C is usually considered smaller and simpler, so this is (almost) only about C.

1. Combined type and variable/field declaration, inside a struct scope [https://godbolt.org/g/Rh94Go]

struct foo {
   struct bar {
 int x;

maddox

Rolling Stone's 500 Greatest Albums of All Time

As seen here: http://www.rollingstone.com/music/lists/500-greatest-albums-of-all-time-20120531

Albums

The Beatles, 'Sgt. Pepper's Lonely Hearts Club Band'
The Beach Boys, 'Pet Sounds'

leommoore

File Magic Numbers

Magic numbers are the first bits of a file which uniquely identify the type of file. This makes programming easier because complicated file structures need not be searched in order to identify the file type.

For example, a jpeg file starts with ffd8 ffe0 0010 4a46 4946 0001 0101 0047 ......JFIF.....G ffd8 shows that it's a JPEG file, and ffe0 identify a JFIF type structure. There is an ascii encoding of "JFIF" which comes after a length code, but that is not necessary in order to identify the file. The first 4 bytes do that uniquely.

This gives an ongoing list of file-type magic numbers.

Image Files

dnerdy

{
    "1": "7642c4c2e24b176ed442153e3097e819bf5ca80e", 
    "2": "b3d784bbaf1286612ad44308231aa58350da17a6", 
    "3": "a05cb173c1ba1c6ae30bcf5edbd5d5e19566e764", 
    "4": "55d264f8671b50b5dbaffa56d1ee719fd429e8f4", 
    "5": "478ec952d186329f825db4ee7978e31dd42de622", 
    "6": "e82bd73e8c188d151ed790b5ad5a24fa01533fa0", 
    "7": "28a9dfb84ef81592f21ed285d7cf09be0b605988", 
    "8": "e98c13fc9df6a893efa0c57bcfa548be664ab8c8", 
    "9": "af316e6df5bded14f9b268fcbffe7892eb5f244c",