大约有 21,000 项符合查询结果（耗时：0.0444秒） [XML]
What is NSZombie?
...y. As such, you can debug subtle over-release/autorelease problems without advanced tools or painstaking needle in haystack searches.
The name is a fairly obvious play on the fact that objects are normally considered "dead" when they reach retain count 0. With this setting, they continue to exist i...
Should ol/ul be inside or outside?
...
Community♦
111 silver badge
answered Apr 15 '11 at 20:04
s4ys4y
44k1212 gold badges6464 silver badges...
What's the difference between `1L` and `1`?
...tes per element. For large vectors, that's less wasted memory and less to wade through for the CPU (so it's typically faster).
Mostly this applies when working with indices.
Here's an example where adding 1 to an integer vector turns it into a double vector:
x <- 1:100
typeof(x) # integer
y &l...
“unpacking” a tuple to call a matching function pointer
..., params);
Just felt that should be stated once in an answer in this thread (after it already appeared in one of the comments).
The basic C++14 solution is still missing in this thread. EDIT: No, it's actually there in the answer of Walter.
This function is given:
void f(int a, double b, void...
What's the difference between nohup and ampersand
...
Community♦
111 silver badge
answered Mar 24 '13 at 5:04
nemonemo
44.3k1010 gold badges115115 silver b...
Redis: possible to expire an element in an array or sorted set?
...rently only possible to expire an entire key/value pair? What if I want to add values to a List type structure and have them get auto removed 1 hour after insertion. Is that currently possible, or would it require running a cron job to do the purging manually?
...
What is a regular expression which will match a valid domain name without a subdomain?
...
CameronCameron
81.8k1818 gold badges172172 silver badges213213 bronze badges
...
How to Use Order By for Multiple Columns in Laravel 4?
...
rmobisrmobis
21.6k66 gold badges5656 silver badges6262 bronze badges
19...
Sending email through Gmail SMTP server with C#
... ASP.NET site I was working on, and it works.
Actually, at some point I had an issue on my code. I didn't spot it until I had a simpler version on a console program and saw it was working (no change on the Gmail side as you were worried about). The below code works just like the samples you referr...
MySQL Creating tables with Foreign Keys giving errno: 150
...
I had the same problem with ALTER TABLE ADD FOREIGN KEY.
After an hour, I found that these conditions must be satisfied to not get error 150:
The Parent table must exist before you define a foreign key to reference it. You mu...