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In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
...cking this information down on my own, and I wanted to help others benefit from that effort. "To be crystal clear, it is not merely OK to ask and answer your own question, it is explicitly encouraged." blog.stackoverflow.com/2011/07/…
– Rick Hanlon II
Jun 16 ...
How do I get an animated gif to work in WPF?
...se a WinForms PictureBox control, and went like this (changed a few things from the thread, most of it the same).
Add a reference to System.Windows.Forms, WindowsFormsIntegration, and System.Drawing to your project first.
<Window x:Class="GifExample.Window1"
xmlns="http://schemas.microsoft....
What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?
...
From Twitter Bootstrap documentation:
small grid (≥ 768px) = .col-sm-*,
medium grid (≥ 992px) = .col-md-*,
large grid (≥ 1200px) = .col-lg-*.
...
Your content must have a ListView whose id attribute is 'android.R.id.list'
...savedInstanceState);
setContentView(R.layout.activity_main);
addPreferencesFromResource(R.xml.preferences);
preferences.xml:
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
<PreferenceCategory
android:key="up...
How do I use extern to share variables between source files?
...omes 'should the header include #undef DEFINE_VARIABLES?'
If you omit that from the header and wrap any defining invocation with
#define and #undef:
#define DEFINE_VARIABLES
#include "file2c.h"
#undef DEFINE_VARIABLES
in the source code (so the headers never alter the value of
DEFINE_VARIABLES), th...
Imitate Facebook hide/show expanding/contracting Navigation Bar
... = YES;
Works for me.
If your coding in swift you have to use this way (from https://stackoverflow.com/a/27662702/2283308)
navigationController?.hidesBarsOnSwipe = true
share
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improve this ans...
How do I tell Spring Boot which main class to use for the executable jar?
...
If you do NOT use the spring-boot-starter-parent pom, then from the Spring documentation:
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>1.1.3.RELEASE</version>
...
python re.sub group: number after \number
...swer is:
re.sub(r'(foo)', r'\g<1>123', 'foobar')
Relevant excerpt from the docs:
In addition to character escapes and
backreferences as described above,
\g will use the substring
matched by the group named name, as
defined by the (?P...) syntax.
\g uses the corresponding
gro...
Undoing a git bisect mistake
...
From the git-bisect documentation:
Bisect log and bisect replay
After having marked revisions as good or bad, issue the following command to show what has been done so far:
$ git bisect log
If you discover tha...
How to check for an active Internet connection on iOS or macOS?
....h>
Now just call this function:
/*
Connectivity testing code pulled from Apple's Reachability Example: https://developer.apple.com/library/content/samplecode/Reachability
*/
+(BOOL)hasConnectivity {
struct sockaddr_in zeroAddress;
bzero(&zeroAddress, sizeof(zeroAddress));
zer...