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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ctor、string或deque，则使用erase-remove习惯用法。
SeqContainer<int> c;
c.erase(remove(c.begin(),c.end(),1963),c.end());
如果容器是list，则使用list::remove。
如果容器是一个标准关联容器，则使用它的erase成员函数。
要删除容器中满足特定条件的...
Code Golf - π day
..., I am using OpenBSD and some supposedly non-portable extensions at this point.
93 chars. This is based on same formula as FORTRAN solution (slightly different results than test cases). Calculates X^2=R^2-Y^2 for every Y
[rdPr1-d0<p]sp1?dsMdd*sRd2%--
[dd*lRr-vddlMr-32rlpxRR42r2*lpxRRAP4*2+lN+sN...
How to do ToString for a possibly null object?
...
It would be great if Convert.ToString() had a proper overload for this.
There's been a Convert.ToString(Object value) since .Net 2.0 (approx. 5 years before this Q was asked), which appears to do exactly what you want:
http://msdn.microsoft.co...
Why doesn't RecyclerView have onItemClickListener()?
...
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
final String element = mDataset[position];
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onClic...
How do you obtain a Drawable object from a resource id in android package?
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As of API 22. getDrawable(int id) is deprecated. Use getDrawable(int id, Resources.Theme theme) instead. The method getTheme() should be helpful.
– Isaac Zais
Apr 17 '15 at 18:07
...
Saving a Numpy array as an image
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Be careful when converting to jpg since it is lossy and so you may not be able to recover the exact data used to generate the image.
– Feanil
Dec 20 '12 at 15:20
...
Get integer value of the current year in Java
I need to determine the current year in Java as an integer. I could just use java.util.Date() , but it is deprecated.
15 A...
What are these ^M's that keep showing up in my files in emacs?
...
In git-config, set core.autocrlf to true to make git automatically convert line endings correctly for your platform, e.g. run this command for a global setting:
git config --global core.autocrlf true
share
...
What does a lazy val do?
...val is executed when it is accessed the first time.
scala> val x = { println("x"); 15 }
x
x: Int = 15
scala> lazy val y = { println("y"); 13 }
y: Int = <lazy>
scala> x
res2: Int = 15
scala> y
y
res3: Int = 13
scala> y
res4: Int = 13
In contrast to a method (defined with d...
Difference between API and ABI
... some library function we write code like:
long howManyDecibels = 123L;
int ok = livenMyHills( howManyDecibels);
and we needed to know that there is a method livenMyHills(), which takes a long integer parameter. So as a Programming Interface it's all expressed in source code. The compiler turns...