大约有 47,000 项符合查询结果（耗时：0.0496秒） [XML]
Why use double indirection? or Why use pointers to pointers?
...ol;
//fill data structure
word = malloc(4 * sizeof *word); // assum>me m> it worked
strcpy(word, "foo");
sentence = malloc(4 * sizeof *sentence); // assum>me m> it worked
sentence[0] = word;
sentence[1] = word;
sentence[2] = word;
sentence[3] = NULL;
monologue = malloc(4...
Load a UIView from nib in Swift
...
Original Solution
I created a XIB and a class nam>me m>d Som>me m>View (used the sam>me m> nam>me m> for
convenience and readability). I based both on a UIView.
In the XIB, I changed the "File's Owner" class to Som>me m>View (in the identity inspector).
I created a UIView outlet in Som>me m>View.swift,...
Check if an apt-get package is installed and then install it if it's not on Linux
...
To check if packagenam>me m> was installed, type:
dpkg -s <packagenam>me m>>
You can also use dpkg-query that has a neater output for your purpose, and accepts wild cards, too.
dpkg-query -l <packagenam>me m>>
To find what package owns the com...
How to detect when facebook's FB.init is complete
...
Update on Jan 04, 2012
It seems like you can't just call FB-dependent m>me m>thods (for example FB.getAuthResponse()) right after FB.init() like before, as FB.init() seems to be asynchronous now. Wrapping your code into FB.getLoginStatus() response seems to do the trick of detecting when API is full...
Split string into an array in Bash
... input because the space is treated specially.
To access an individual elem>me m>nt:
echo "${array[0]}"
To iterate over the elem>me m>nts:
for elem>me m>nt in "${array[@]}"
do
echo "$elem>me m>nt"
done
To get both the index and the value:
for index in "${!array[@]}"
do
echo "$index ${array[index]}"
done...
Bulk insert with SQLAlchemy ORM
... updates!
For instance, you can do:
s = Session()
objects = [
User(nam>me m>="u1"),
User(nam>me m>="u2"),
User(nam>me m>="u3")
]
s.bulk_save_objects(objects)
s.commit()
Here, a bulk insert will be made.
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Const in JavaScript: when to use it and is it necessary?
I've recently com>me m> across the const keyword in JavaScript. From what I can tell, it is used to create immutable variables , and I've tested to ensure that it cannot be redefined (in Node.js):
...
When do you use Java's @Override annotation and why?
...
Use it every tim>me m> you override a m>me m>thod for two benefits. Do it so that you can take advantage of the compiler checking to make sure you actually are overriding a m>me m>thod when you think you are. This way, if you make a common mistake of mi...
How do I disable right click on my web page?
...ou can do that with JavaScript by adding an event listener for the "contextm>me m>nu" event and calling the preventDefault() m>me m>thod:
docum>me m>nt.addEventListener('contextm>me m>nu', event => event.preventDefault());
That being said: DON'T DO IT.
Why? Because it achieves nothing other than annoying users. ...
Need for predictable random generator
I'm a web-gam>me m> developer and I got a problem with random numbers. Let's say that a player has 20% chance to get a critical hit with his sword. That m>me m>ans, 1 out of 5 hits should be critical. The problem is I got very bad real life results — som>me m>tim>me m>s players get 3 crits in 5 hits, som>me m>tim>me m>s none i...