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What happens to an open file handle on Linux if the pointed file gets moved or deleted
...
if (close(fd) != 0) {
perror_and_exit();
}
return 0;
}
data:
1234
1234
1234
1234
1234
Use gcc code.c to produce a.out. Run ./a.out. When you see the following output:
line: 1234
Use rm data to delete data. But ./a.out will continue to run without errors and produce the following w...
How to print a number with commas as thousands separators in JavaScript
...ith commas as thousands separators. For example, I want to show the number 1234567 as "1,234,567". How would I go about doing this?
...
How do you use an identity file with rsync?
...
eval $(ssh-agent) # Create agent and environment variables
ssh-add ~/.ssh/1234-identity
ssh-agent is a user daemon which holds unencrypted ssh keys in memory. ssh finds it based on environment variables which ssh-agent outputs when run. Using eval to evaluate this output creates the environment...
How to checkout a specific Subversion revision from the command line?
...
Either
svn checkout url://repository/path@1234
or
svn checkout -r 1234 url://repository/path
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How can I strip first X characters from string using sed?
...nux in a small industrial box. I have a variable containing the text pid: 1234 and I want to strip first X characters from the line, so only 1234 stays. I have more variables I need to "clean", so I need to cut away X first characters and ${string:5} doesn't work for some reason in my system.
...
How do I use variables in Oracle SQL Developer?
...o something very similar
SQL> variable v_emp_id number;
SQL> select 1234 into :v_emp_id from dual;
1234
----------
1234
SQL> select *
2 from emp
3 where empno = :v_emp_id;
no rows selected
In SQL Developer, if you run a statement that has any number of bind variab...
How to get a URL parameter in Express?
...issue on getting the value of tagid from my URL: localhost:8888/p?tagid=1234 .
4 Answers
...
Remove duplicate dict in list in Python
...ver, with a few lines of code, you can also do that:
l = [{'a': 123, 'b': 1234},
{'a': 3222, 'b': 1234},
{'a': 123, 'b': 1234}]
seen = set()
new_l = []
for d in l:
t = tuple(d.items())
if t not in seen:
seen.add(t)
new_l.append(d)
print new_l
Example outp...
Remove commas from the string using JavaScript
...aximumFractionDigits: 2
})
// Good Inputs
parseFloat(numFormatter.format('1234').replace(/,/g,"")) // 1234
parseFloat(numFormatter.format('123').replace(/,/g,"")) // 123
// 3rd decimal place rounds to nearest
parseFloat(numFormatter.format('1234.233').replace(/,/g,"")); // 1234.23
parseFloat(numFo...
Multiple working directories with Git?
.../path/to/bare-source (bare)
/path/to/linked-worktree abcd1234 [master]
/path/to/other-linked-worktree 1234abc (detached HEAD)
There is also porcelain format option available.
The porcelain format has a line per attribute.
Attributes are listed with a label and value separa...