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Why doesn't Objective-C support private methods?
...ss all methods.
As many have answered (both here and in other questions), compile-time private methods are supported; if a class doesn't declare a method in its publicly available interface, then that method might as well not exist as far as your code is concerned. In other words, you can achieve...
Postgres and Indexes on Foreign Keys and Primary Keys
...put indexes on Foreign Keys and Primary Keys? How can I tell? Is there a command that will return all indexes on a table?
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【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
文章源自：http://doc.iotxx.com/index.php?title=BLE技术揭秘
BLE技术揭秘
BLE是低功耗蓝牙的英文缩写（Bluetooth Low Energy），是蓝牙4.0版本起开始支持的新的、低功耗版本的蓝牙技术规范。蓝牙技术联盟（Bluetooth SIG）在2010年发布了跨...
Correct way to use StringBuilder in SQL
...ard that string concatenation will use a StringBuilder under the covers if compiled with the Sun/Oracle compiler. This is true, it will use one StringBuilder for the overall expression. But it will use the default constructor, which means in the majority of cases, it will have to do a reallocation. ...
Which “href” value should I use for JavaScript links, “#” or “javascript:void(0)”?
....
OR
Use href="javascript:void(0)"
The second is clearly much easier to communicate.
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With arrays, why is it the case that a[5] == 5[a]?
...+ 5), and from elementary school math we know those are equal (addition is commutative).
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Is there a way to get rid of accents and convert a whole string to regular letters?
...alize(string, Normalizer.Form.NFD);
// or Normalizer.Form.NFKD for a more "compatable" deconstruction
This will separate all of the accent marks from the characters. Then, you just need to compare each character against being a letter and throw out the ones that aren't.
string = string.replaceA...
Change MySQL default character set to UTF-8 in my.cnf?
Currently we are using the following commands in PHP to set the character set to UTF-8 in our application.
18 Answers
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Best ways to teach a beginner to program? [closed]
...'s still a work in progress, but I hope it helps.
1) FizzBuzz. Start with command line programs. You can write some fun games, or tools, very quickly, and you learn all of the language features very quickly without having to learn the GUI tools first. These early apps should be simple enough that y...
How does a Java HashMap handle different objects with the same hash code?
...The hashmap will then look into the corresponding bucket, and then it will compare the key that you gave with the keys of all pairs in the bucket, by comparing them with equals().
Now you can see how this is very efficient for looking up key-value pairs in a map: by the hash code of the key the has...