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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...
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How do you obtain a Drawable object from a resource id in android package?

... 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 ...
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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...
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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...
https://www.tsingfun.com/it/cpp/1906.html 

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...
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What does a lazy val do?

...val is executed when it is accessed the first time. scala&gt; val x = { println("x"); 15 } x x: Int = 15 scala&gt; lazy val y = { println("y"); 13 } y: Int = &lt;lazy&gt; scala&gt; x res2: Int = 15 scala&gt; y y res3: Int = 13 scala&gt; y res4: Int = 13 In contrast to a method (defined with d...
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How to escape double quotes in JSON

...Tag wird ein neues Reiseziel angesteuert bis wir. A second encoding then converts it again, escaping the already escaped characters: FROM: Heute startet unsere Rundreise \"Example text\". Jeden Tag wird ein neues Reiseziel angesteuert bis wir. TO: Heute startet unsere Rundreise \\\"Example text\...
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How do I skip an iteration of a `foreach` loop?

... You want: foreach (int number in numbers) // &lt;--- go back to here --------+ { // | if (number &lt; 0) // | { ...
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Reading a simple text file

...ring text=""; String[] s; private Vector&lt;String&gt; wordss; int j=0; private StringTokenizer tokenizer; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); se...
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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...