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Count occurrences of a char in plain text file
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If all you need to do is count the number of lines containing your character, this will work:
grep -c 'f' myfile
However, it counts multiple occurrences of 'f' on the same line as a single match.
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How to parse/read a YAML file into a Python object? [duplicate]
... json.loads(j[1])
if not load_yaml_file:
import os, sys
print """
ERROR: %s requires ruby or python-yaml to be installed.
apt-get install ruby
OR
apt-get install python-yaml
OR
Demonstrate your mastery of Python by using pip.
Please research the latest pip-based install steps for ...
Count number of lines in a git repository
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@buck Thanks, but I am getting an error when I try that command 'cannot make pipe for process substitution: Function not implemented wc: unrecognized option --files0-from='. Any ideas?
– Lea Hayes
Nov 21 '14 at 14:02
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How to select multiple rows filled with constants?
...as a life saver. One thing to note: If you have run into a too many values error, you can just do a UNION ALL in the WITH clause.
– ScrappyDev
Sep 18 '18 at 19:47
add a commen...
what is the unsigned datatype?
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add a comment
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How does HTTP file upload work?
...?) always threaded so that they can handle concurrent connections. Essentially, the daemon process that's listening on port 80 immediately hands off the task of serving to another thread/process in order that it can return to listening for another connection; even if two incoming connections arrive...
How can I generate Unix timestamps?
... BSD date supports also +%s. Probably universal, as date is normally defined in POSIX.2.
– Dereckson
Nov 5 '17 at 15:41
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Python __str__ and lists
In Java, if I call List.toString(), it will automatically call the toString() method on each object inside the List. For example, if my list contains objects o1, o2, and o3, list.toString() would look something like this:
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In C, how should I read a text file and print all strings
...sizeof buf, file)) > 0)
fwrite(buf, 1, nread, stdout);
if (ferror(file)) {
/* deal with error */
}
fclose(file);
}
The second method above is essentially how you will read a file with a dynamically allocated array:
char *buf = malloc(chunk);
if (buf == NULL) {
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Start ssh-agent on login
...it is complicated to maintain;
it evaluates storage file which may lead to errors or security breach;
it starts agent but doesn't stop it which is close equivalent to leaving the key in ignition.
If your keys do not require to type password, I suggest following solution. Add the following to your ...