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When and why JPA entities should implement Serializable interface?
...implementing the serializable interface?
– Hanumantha_3048092
Dec 20 '19 at 6:55
@Hanumantha_3048092 Yes. Entity mappi...
Error installing mysql2: Failed to build gem native extension
...l issue (even when using the --with-mysql-config=/usr/local/mysql/bin/mysql_config )
– Americo Savinon
Mar 8 '13 at 21:32
2
...
Undoing a 'git push'
...
Then you need to 'force' push the old reference.
git push -f origin last_known_good_commit:branch_name
or in your case
git push -f origin cc4b63bebb6:alpha-0.3.0
You may have receive.denyNonFastForwards set on the remote repository. If this is the case, then you will get an error which inclu...
How do I measure the execution time of JavaScript code with callbacks?
... put this at the top of my app.
var start = process.hrtime();
var elapsed_time = function(note){
var precision = 3; // 3 decimal places
var elapsed = process.hrtime(start)[1] / 1000000; // divide by a million to get nano to milli
console.log(process.hrtime(start)[0] + " s, " + elapsed....
Why do you use typedef when declaring an enum in C++?
...claring your enum the first way allows you to use it like so:
TokenType my_type;
If you use the second style, you'll be forced to declare your variable like this:
enum TokenType my_type;
As mentioned by others, this doesn't make a difference in C++. My guess is that either the person who wrote...
How to access property of anonymous type in C#?
...>();
nodes.Add(
new
{
Checked = false,
depth = 1,
id = "div_1"
});
1. Solution with dynamic
In C# 4.0 and higher versions, you can simply cast to dynamic and write:
if (nodes.Any(n => ((dynamic)n).Checked == false))
Console.WriteLine("found not checked element!");
Note:...
iphone Core Data Unresolved error while saving
...itical 'userInfo' keys.
Here's a version of the method I've been using. ('_sharedManagedObjectContext' is a #define for '[[[UIApplication sharedApplication] delegate] managedObjectContext]'.)
- (BOOL)saveData {
NSError *error;
if (![_sharedManagedObjectContext save:&error]) {
/...
What is the best way to find the users home directory in Java?
...FolderPath allows you to retrieve special folders, like My Documents (CSIDL_PERSONAL) or Local Settings\Application Data (CSIDL_LOCAL_APPDATA).
Sample JNA code:
public class PrintAppDataDir {
public static void main(String[] args) {
if (com.sun.jna.Platform.isWindows()) {
...
Check if a value is an object in JavaScript
...so objects and should be included in your check.
– JS_Riddler
Dec 21 '12 at 18:25
4
In this case ...
Integrating the ZXing library directly into my Android application
...t XML file:
<ImageView
android:id="@+id/qrCode"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="50dp"
android:layout_centerHorizontal="true"/>
Code snippet:
// ImageView to display the QR code in. This should be defin...