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覆盖equal时的通用约定 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...通用约定自反性、对称性、传递性、一致性1、自反性：x.equal(x) = true;
2、对称性：x.equal(y) = y.equal(x);
3、传递性：x.equal(y) = y.equal(z) = x.equal(z);
4、一致性：x.equal(y) 不改变值的情况下多次调用结果一致。
（假定x, y, z非null）
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解决：make[x]: *** 没有规则可制作目标\"xxx\" - 更多技术 - 清泛网 - 专...
解决：make[x]: *** 没有规则可制作目标"xxx"Linux编译报错：make[x]: *** 没有规则可制作目标"xxx"原因一般是目标"xxx"中的路径未找到导致的，请检查一下目标是否存在！！Linux编译报错：make[x]: *** 没有规则可制作目标"xxx"
原因一般是...
%d,%c,%s,%x等转换符 释义 - C/C++ - 清泛IT论坛，有思想、有深度
...制整数
%o 八进制整数 e.g. 0123
%x(%X) 十六进制整数0f(0F) e.g. 0x1234
%p 指针
%s 字符串 %S Unicode字符串（双字节）
%% "%"
2．标志
左对齐："-" ...
What does the Subversion status symbol “~” mean?
...t has been replaced by different kind of object.
So perhaps it was originally a single file, but you changed it to a directory, or something along those lines?
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How to get the width and height of an android.widget.ImageView?
...eight, finalWidth;
final ImageView iv = (ImageView)findViewById(R.id.scaled_image);
final TextView tv = (TextView)findViewById(R.id.size_label);
ViewTreeObserver vto = iv.getViewTreeObserver();
vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
public boolean onPreDraw() {
...
The cast to value type 'Int32' failed because the materialized value is null
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A linq-to-sql query isn't executed as code, but rather translated into SQL. Sometimes this is a "leaky abstraction" that yields unexpected behaviour.
One such case is null handling, where there can be unexpected nulls in different places. ...DefaultI...
Algorithm for Determining Tic Tac Toe Game Over
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You know a winning move can only happen after X or O has made their most recent move, so you can only search row/column with optional diag that are contained in that move to limit your search space when trying to determine a winning board. Also since there are a fixed n...
How to create a button programmatically?
...ewDidLoad() {
super.viewDidLoad()
let button = UIButton(frame: CGRect(x: 100, y: 100, width: 100, height: 50))
button.backgroundColor = .greenColor()
button.setTitle("Test Button", forState: .Normal)
button.addTarget(self, action: #selector(buttonAction), forControlEvents: .TouchUpInside)...
Remove plot axis values
I was just wondering if there is a way to get rid of axis values, either the x-axis or y-axis respectively, in an r-plot graph.
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Finding the max value of an attribute in an array of objects
I'm looking for a really quick, clean and efficient way to get the max "y" value in the following JSON slice:
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