[Solved] Limit output to 5 items [duplicate]

you can use the head command to limit the output of grep to the first 5 results before passing it to xargs. Here’s the modified command: grep -r -l ‘foo’ | head -n 5 | xargs sed -i ‘s/foo/bar/g’ For items 5 to 10, you can use a combination of head and tail commands to … Read more

[Solved] GCC compiler errors with “No such file or directory”

please do the following. On terminal check the present directory by ‘pwd’ command and then check the directory in which your programme is there and see if they are same or not. And while writing gcc yourfile it’s case sensitive. Hope this helps 1 solved GCC compiler errors with “No such file or directory”

[Solved] Ubuntu Cronjob with rsync

To reduce the amount of space you use significantly, you’ll need to reduce the number of copies you keep. This is the 2nd argument to the script. So if you run every 3 days, and want to keep a month of backups, change it to: ../rsyncsnapshot.sh daily 10 0 solved Ubuntu Cronjob with rsync

[Solved] garbage value in C array

In the function argument: char arr[9][5] In the loop: for (i = 0; i<5; i++) { for (j = 0; j<9;j++) { if (arr[i][j] == 1) You flipped the position of i and j. i should go from 0 to 9, j from 0 to 5. 0 solved garbage value in C array

[Solved] How to improve the uniformly distributed of a given random function to generate uniformly distributed numbers? [closed]

what can be improved on a given random function to make it more random or for a bigger range or something else? and therefore no SRANDOM can be used up to now. How to improve the randomness of the fuction above, if possible ? Sooo write your own SRANDOM with your own semantics. Ex: srandom() … Read more

[Solved] Linux C++ new operator incredibly slow [closed]

Given that 98% of the time is spent in that function, I rewrote your “get a number” function: int Ten_To_One_Million_Ten(void) { unsigned Number = (((unsigned)rand() << 5) + (unsigned)rand()%32) % 1000000 + 10; assert(Number >= 10 && Number <= 1000010); return Number; } Now, on my machine, using clang++ (Version 3.7 from about 4 weeks … Read more

[Solved] how to convert char in octal format without standart C functions like print(f) [closed]

Decimal and octal are number bases, this only matters when presenting a number (or when inputing a number); the actual number is generally stored in binary in the computer’s memory but this doesn’t often matter to typical programs. In your case, conversion to octal generally involves extracting three bits at a time (since 23 is … Read more