大约有 47,000 项符合查询结果（耗时：0.0734秒） [XML]
How to make the tab character 4 spaces instead of 8 spaces in nano?
...
I'm using mint and when I set tabsize from 8 to 4 in /etc/nanorc and go back to the file, I'm still getting 8 spaces in the tab, I even tried to copy that nanorc file to ~/. but that doesn't work, closed and reopened terminal, but still I can't get 4 spaces on th...
Why aren't variable-length arrays part of the C++ standard?
...at you should never use recursion and that you should allocate all objects from the heap.
– Andreas Brinck
Dec 11 '09 at 10:46
17
...
How do I avoid capturing self in blocks when implementing an API?
...swer
Instead of accessing self directly, you should access it indirectly, from a reference that will not be retained. If you're not using Automatic Reference Counting (ARC), you can do this:
__block MyDataProcessor *dp = self;
self.progressBlock = ^(CGFloat percentComplete) {
[dp.delegate myAP...
Test if a string contains any of the strings from an array
How do I test a string to see if it contains any of the strings from an array?
14 Answers
...
How does collections.defaultdict work?
...igure out what this method means. Can somebody help? Here are two examples from the python docs
15 Answers
...
Why use Object.prototype.hasOwnProperty.call(myObj, prop) instead of myObj.hasOwnProperty(prop)?
If I understand correctly, each and every object in Javascript inherits from the Object prototype, which means that each and every object in Javascript has access to the hasOwnProperty function through its prototype chain.
...
How do I pass a variable by reference?
...ay, struct, whatever), but you couldn't change the pointer that was copied from the outer scope - when you were done with the function, the original pointer still pointed to the same address. C++ introduced references, which behaved differently.
– Blair Conrad
...
Is there auto type inferring in Java?
...t this was closed as "Will not fix", reason given was :
Humans benefit from the redundancy of the type declaration in two ways.
First, the redundant type serves as valuable documentation - readers do not
have to search for the declaration of getMap() to find out what type it
r...
What is boxing and unboxing and what are the trade offs?
... which is ever so convenient. Primitives (in Java at least) don't descend from Object, can't have fields, can't have methods, and just generally behave very differently from other types of values. On the other hand, working with them can be very fast and space efficient. Thus the trade off.
...
Is it possible to implement dynamic getters/setters in JavaScript?
...
2013 and 2015 Update (see below for the original answer from 2011):
This changed as of the ES2015 (aka "ES6") specification: JavaScript now has proxies. Proxies let you create objects that are true proxies for (facades on) other objects. Here's a simple example that turns any pro...