大约有 48,000 项符合查询结果（耗时：0.0797秒） [XML]
How do negated patterns work in .gitignore?
...
|
edited May 12 '10 at 15:55
answered May 12 '10 at 15:31
...
How to work with complex numbers in C?
...
int main() {
double complex z1 = 1.0 + 3.0 * I;
double complex z2 = 1.0 - 4.0 * I;
printf("Working with complex numbers:\n\v");
printf("Starting values: Z1 = %.2f + %.2fi\tZ2 = %.2f %+.2fi\n", creal(z1), cimag(z1), creal(z2), cimag(z2));
double complex sum = z1 + z2;
pr...
.bashrc at ssh login
...Bash, thus all these comments are obsolete :)
– user529649
Jul 2 '12 at 2:09
1
This isn't necessa...
Bash script - variable content as a command to run
...
217
You just need to do:
#!/bin/bash
count=$(cat last_queries.txt | wc -l)
$(perl test.pl test2 $...
postgresql: INSERT INTO … (SELECT * …)
...LE tblB (id serial, time integer);
INSERT INTO tblB (time) VALUES (5000), (2000);
psql postgres
CREATE TABLE tblA (id serial, time integer);
INSERT INTO tblA
SELECT id, time
FROM dblink('dbname=dbtest', 'SELECT id, time FROM tblB')
AS t(id integer, time integer)
WHERE time > 10...
How do I use VaryByParam with multiple parameters?
In ASP.NET MVC2 I use OutputCache and the VaryByParam attribute. I got it working fine with a single parameter, but what is the correct syntax when I have several parameters on the method?
...
Which characters are illegal within a branch name?
...
2 Answers
2
Active
...
Check for array not empty: any?
...
251
any? isn't the same as not empty? in some cases.
>> [nil, 1].any?
=> true
>> [...
Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
...r empty sha1 tree (instead of relying of a "well known value").
Note: Git 2.25.1 (Feb. 2020) proposes in commit 9c8a294:
empty_tree=$(git mktree </dev/null)
# Windows:
git mktree <NUL
And adds:
As a historical note, the function now known as repo_read_object_file() was taught the empty...