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Java inner class and static nested class
...atic field of the class, A. That does not mean the anonymous class created by 'new A() { int t() { return 2; } }' is static any more than if I simply assigned any other object to the static field, a, as in: class B { static void main(string s) {A.a = new A()}} (A & B in same package) This doesn'...
Counting DISTINCT over multiple columns
...05) that works pretty well for me and I can use as many columns as I need (by adding them to the CHECKSUM() function). The REVERSE() function turns the ints into varchars to make the distinct more reliable
SELECT COUNT(DISTINCT (CHECKSUM(DocumentId,DocumentSessionId)) + CHECKSUM(REVERSE(DocumentId...
Is log(n!) = Θ(n·log(n))?
... = log(1) + log(2) + ... + log(n-1) + log(n)
You can get the upper bound by
log(1) + log(2) + ... + log(n) <= log(n) + log(n) + ... + log(n)
= n*log(n)
And you can get the lower bound by doing a similar thing after throwing away the first half of the sum:
lo...
What exactly is the meaning of an API? [closed]
...a C library
Core Windows system calls: WinAPI
The Classes and Methods in Ruby's core library
The Document Object Model exposed by browsers to JavaScript
Web services, such as those provided by Facebook's Graph API
An implementation of a protocol such as JNI in Java
Happy coding.
...
如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
...看Oracle用户的SQL执行历史记录？select * from v$sqlarea t order by t LAST_ACTIVE_TIME desc注意 ：执行此语句等等一些相关的语句 必须具有DBA 的权限 虽然
select * from v$sqlarea t order by t.LAST_ACTIVE_TIME desc
注意 ：执行此语句等等一些相关的语...
项目管理实践【四】Bug跟踪管理【Bug Trace and Management】 - 项目管理 -...
...ctive Tickets - 目前有哪些 Tickets 是 Active 的
Active Tickets by Version
Active Tickets by Milestone - 靠 Milestone 划分 Active Tickets
Assigned, Active Tickets by Owner
Assigned, Active Tickets by Owner (Full Description)
All Tickets By Milestone (Including close...
Java HashMap performance optimization / alternative
... + powerOf52(b[1], 3) + powerOf52(b[2], 4);
}
public static int powerOf52(byte b, int power) {
int result = b;
for (int i = 0; i < power; i++) {
result *= 52;
}
return result;
}
The arrays are sorted to ensure this methods fulfills the hashCode() contract that equal obj...
Why can a class not be defined as protected?
... default.
Since there is no way to restrict this class being subclassed by only few classes (we cannot restrict class being inherited by only few classes out of all the available classes in a package/outside of a package), there is no use of protected access specifiers for top level classes. Henc...
“From View Controller” disappears using UIViewControllerContextTransitioning
...'s view is going to be hidden (removed from the view hierarchy) completely by the end of transition. In other words it means that after the initial presentation animation finishes only the presented view controller's view will be visible and not the presenting view controller's view. For example if ...
How to get image height and width using java?
...
This is the best answer by a very long way, and you've been cheated out of votes by the same answer posted by someone else 17 days after your post. This should be the top answer not the bottom.
– Oversteer
Jun ...