Chad Rehm chadrehm
chadrehm
/ filecopy.c
Last active
March 13, 2021 19:18
C program to learn posix function. Copy a file.
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| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <sys/types.h> | |
| #include <sys/stat.h> | |
| #include <unistd.h> | |
| #include <fcntl.h> | |
| #include <errno.h> | |
| #include <string.h> |
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| q1 | |
| qAccept | |
| qReject | |
| 0,1 | |
| q1 (0,x,R) q2 | |
| q1 (1,x,R) q3 | |
| q1 (#,#,R) q8 | |
| q2 (0,0,R) q2 | |
| q2 (1,1,R) q2 | |
| q2 (#,#,R) q4 |
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| export const ScrollTopArrowComponent = () => { | |
| // Track whether the scroll arrow is needed. | |
| const [showScroll, setShowScroll] = useState(null); | |
| // Check the scroll state, re-memoize when scroll state changes. | |
| const checkScrollTop = useCallback( | |
| () => { | |
| const headerHeight = 400; | |
| if (!showScroll && window.pageYOffset > headerHeight) { | |
| setShowScroll(true); |