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C# equivalent of the IsNull() function in SQL Server
... in the right-hand operand position to a boolean variable. I had to change from this.BinaryExists = vModel.BinaryExists ?? 0; to this.BinaryExists = vModel.BinaryExists ?? false;.
– Kuyenda
Jul 7 '11 at 14:00
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What is a void pointer in C++? [duplicate]
... it is a void pointer
int *pInt = static_cast<int*>(pVoid); // cast from void* to int*
cout << *pInt << endl; // can dereference pInt
Source: link
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Is it possible to specify the schema when connecting to postgres with JDBC?
...ble this a few years back. You'll have to build the PostreSQL JDBC driver from source (after adding in the patch) to use it:
http://archives.postgresql.org/pgsql-jdbc/2008-07/msg00012.php
http://jdbc.postgresql.org/
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Scroll Automatically to the Bottom of the Page
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jQuery isn't necessary. Most of the top results I got from a Google search gave me this answer:
window.scrollTo(0,document.body.scrollHeight);
Where you have nested elements, the document might not scroll. In this case, you need to target the element that scrolls and use it's...
Replace a character at a specific index in a string?
...s that are normally hidden in the current scope (private methods or fields from another class...).
public static void main(String[] args) {
String text = "This is a test";
try {
//String.value is the array of char (char[])
//that contains the text of the String
Field...
Use “ENTER” key on softkeyboard instead of clicking button
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You do it by setting a OnKeyListener on your EditText.
Here is a sample from my own code. I have an EditText named addCourseText, which will call the function addCourseFromTextBox when either the enter key or the d-pad is clicked.
addCourseText = (EditText) findViewById(R.id.clEtAddCourse);
addC...
ConcurrentHashMap vs Synchronized HashMap
...gh concurrent executions.
So, multiple threads can get/put key-value pairs from ConcurrentHashMap without blocking/waiting for each other.
This is implemented for higher throughput.
whereas
Collections.synchronizedMap(), we get a synchronized version of HashMap and it is accessed in blocking manne...
difference between throw and throw new Exception()
...e information about the error.
the second if you want to hide information (from untrusted users).
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How to increase the vertical split window size in Vim
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Another tip from my side:
In order to set the window's width to let's say exactly 80 columns, use
80 CTRL+W |
In order to set it to maximum width, just omit the preceding number:
CTRL+W |
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How to unload a package without restarting R
...("package:,packageName", unload=TRUE, force = TRUE) will not work either.
From a fresh new console or Session > Restart R check memory with the pryr package:
pryr::mem_used()
# 40.6 MB ## This will depend on which packages are loaded obviously (can also fluctuate a bit after the decimal)
C...