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How to check if an int is a null
...equals(null)) can't be true, because if person is null, then a NullPointerEm>x m>ception will be thrown. So the correct em>x m>pression is if (person == null)
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Use of Java's Collections.singletonList()?
...d list.
@return an immutable list containing only the specified object.
em>x m>ample
import java.util.*;
public class HelloWorld {
public static void main(String args[]) {
// create an array of string objs
String initList[] = { "One", "Two", "Four", "One",};
// create...
Mim>x m>ing Angular and ASP.NET MVC/Web api?
I come from using ASP.NET MVC/Web API and now I am starting to use Angular but I am not clear on the proper way to mim>x m> them.
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Under what circumstances is an SqlConnection automatically enlisted in an ambient TransactionScope T
What does it mean for an SqlConnection to be "enlisted" in a transaction? Does it simply mean that commands I em>x m>ecute on the connection will participate in the transaction?
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Frontend tool to manage H2 database [closed]
...rd for shutting down a TCP server
[-tcpShutdown ""] Stop the TCP server; em>x m>ample: tcp://localhost:9094
[-tcpShutdownForce] Do not wait until all connections are closed
[-pg] Start the PG server
[-pgAllowOthers] Allow other computers to connect - see below
[-pgPort ] ...
When to make a type non-movable in C++11?
I was surprised this didn't show up in my search results, I thought someone would've asked this before, given the usefulness of move semantics in C++11:
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How to align an image dead center with bootstrap
...s
Set an element to display: block and center via margin. Available as a mim>x m>in and class.
Just need to add a class .center-block in the img tag, looks like this
<div class="container">
<div class="row">
<div class="span4"></div>
<div class="span4"><img cla...
Pandas: Looking up the list of sheets in an em>x m>cel file
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You can still use the Em>x m>celFile class (and the sheet_names attribute):
m>x m>l = pd.Em>x m>celFile('foo.m>x m>ls')
m>x m>l.sheet_names # see all sheet names
m>x m>l.parse(sheet_name) # read a specific sheet to DataFrame
see docs for parse for more options...
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Django dynamic model fields
I'm working on a multi-tenanted application in which some users can define their own data fields (via the admin) to collect additional data in forms and report on the data. The latter bit makes JSONField not a great option, so instead I have the following solution:
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javascript check for not null
...null' as a string.
Try to check with 'null'
if ('null' != val)
For an em>x m>planation of when and why this works, see the details below.
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