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Dictionary returning a default value if the key does not exist [duplicate]
... trygetvalue doesn't allow you to specify a default value, ie for a string value you may want it to return "" instead of null
– katbyte
Aug 12 '13 at 20:08
1
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Python concatenate text files
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Note, that is will merge last strings of each file with first strings of next file if there are no EOL characters. In my case I got totally corrupted result after using this code. I added wfd.write(b"\n") after copyfileobj to get normal result
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How to get year, month, day, hours, minutes, seconds and milliseconds of the current moment in Java?
... milliseconds of the current moment in Java? I would like to have them as Strings .
9 Answers
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How do you check in python whether a string contains only numbers?
How do you check whether a string contains only numbers?
10 Answers
10
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Best approach to converting Boolean object to string in java
I am trying to convert boolean to string type...
7 Answers
7
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How should a model be structured in MVC? [closed]
... because I am lazy:
public function loginWithPassword(Identity $identity, string $password): string
{
if ($identity->matchPassword($password) === false) {
$this->logWrongPasswordNotice($identity, [
'email' => $identity->getEmailAddress(),
'key' => ...
jQuery select2 get value of select tag?
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Very useful if you have extra properties on the select2 objects
– Shoe
Oct 13 '16 at 15:40
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Hidden Features of JavaScript? [closed]
...oersion, which is a different beast. If you know, that you want to cast to string/number/etc, then you shold do that explicitly.
– Rene Saarsoo
Jun 5 '09 at 18:39
15
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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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How to find out the MySQL root password
...wing queries to change the password:
UPDATE mysql.user SET authentication_string=PASSWORD('password') WHERE User='root';
FLUSH PRIVILEGES;
In MySQL 5.7, the password field in mysql.user table field was removed, now the field name is 'authentication_string'.
Quit the mysql safe mode and start mys...