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Run Java Code Online [closed]
...ne is the best site for the online code running, debugging and it provides extra performance stats also.
Without Sign Up, you can run code upto of maximum 5 sec, and for signup, upto a max of 15 sec. And for Signup, the code management and history is also too good.
However, it has some maximum am...
Xcode source automatic formatting
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Good tip. Extra lame that XCode doesn't have this.
– AndrewK
Dec 10 '13 at 3:41
4
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@UniqueConstraint annotation in Java
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To ensure a field value is unique you can write
@Column(unique=true)
String username;
The @UniqueConstraint annotation is for annotating multiple unique keys at the table level, which is why you get an error when applying it to a field.
References (JPA TopLink):
@UniqueConstraint
@Column
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Select all contents of textbox when it receives focus (Vanilla JS or jQuery)
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Also just for extra info: "input[type=text]" now can be "input:text" regards
– Ricardo Vega
Jan 26 '09 at 22:29
8
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MySQL - length() vs char_length()
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LENGTH() returns the length of the string measured in bytes.
CHAR_LENGTH() returns the length of the string measured in characters.
This is especially relevant for Unicode, in which most characters are encoded in two bytes. Or UTF-8, where the number of by...
Why was the switch statement designed to need a break?
...her languages supported more sophisticated cases (ranges, multiple values, strings...) at the cost, perhaps, of efficiency.
– PhiLho
Oct 31 '08 at 6:29
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Undo scaffolding in Rails
...p in mind that it will remove the view folder for my_foo, even if you have extra files there.
– Andrew K
Sep 2 '17 at 21:22
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What's wrong with overridable method calls in constructors?
...rate:
public class ConstructorCallsOverride {
public static void main(String[] args) {
abstract class Base {
Base() {
overrideMe();
}
abstract void overrideMe();
}
class Child extends Base {
final int x;...
How to set focus on input field?
...ing '@' we compare the trigger value to "true" since @ always results in a string.
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Cannot overwrite model once compiled Mongoose
...se');
var Schema = mongoose.Schema;
var userSchema = new Schema({
name:String,
email:String,
password:String,
phone:Number,
_enabled:Boolean
});
module.exports = mongoose.model('users', userSchema);
check.js
var mongoose = require('mongoose');
var User = require('./user_...