%% title = "prefix matches with C strings"

% id = "01JCGAM55352EF247HZ358BAJ8"
- one thing I realised while reading some code at work that worked with C strings: it's surprising how easy it is to match a prefix on a C string.

```c
if (s != NULL
    && s[0] == 'h'
    && s[1] == 'u'
    && s[2] == 'g')
{
    // ...
}
```

% id = "01JCGAM5537WYE3GEN6WGX8WD0"
- this works because of the NUL terminator---if it appears at any point in the string, the `s[i] == c` comparison will return `false`, thus breaking the `&&` chain---so indices always stay in-bounds!