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What is the meaning of the CascadeType.ALL for a @ManyToOne JPA association
... to the persistence provider that the join column should be in the ADDRESS table.
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Performing user authentication in Java EE / JSF using j_security_check
...thenticate users based on username and MD5-hashed passwords in my database table:
http://blog.gamatam.com/2009/11/jdbc-realm-setup-with-glassfish-v3.html
Note: the post talks about a user and a group table in the database. I had a User class with a UserType enum attribute mapped via javax.persiste...
What is the most efficient Java Collections library? [closed]
...might not care about this technical detail, he wants to store data representable with ints efficiently.
First the relevant part of the code:
new Operation() {
private long usedMem() {
System.gc();
return Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
...
static function in C
...nt of the object file.
Linkers use something called PLT(Procedure linkage table) and GOT(Global offsets table) to understand symbols that they have access to link to .
For now think that GOT and PLT magically bind all the addresses and a dynamic section holds information of all these functions tha...
How can I check the size of a collection within a Django template?
...
See https://docs.djangoproject.com/en/stable/ref/templates/builtins/#if : just use, to reproduce their example:
{% if athlete_list %}
Number of athletes: {{ athlete_list|length }}
{% else %}
No athletes.
{% endif %}
...
Multiline string literal in C#
... to form a verbatim string literal:
string query = @"SELECT foo, bar
FROM table
WHERE id = 42";
You also do not have to escape special characters when you use this method, except for double quotes as shown in Jon Skeet's answer.
...
How does this CSS produce a circle?
...v id="box">
<div id="innerBox"></div>
</div>
<table id="chooser">
<tr>
<td><label for="total">Total</label></td>
<td><input id="total" value="0" type="range" min="0" max="100" step="1" /></td>
<t...
Difference between “git add -A” and “git add .”
...
Here is a table for quick understanding:
Git Version 1.x:
Git Version 2.x:
Long-form flags:
git add -A is equivalent to git add --all
git add -u is equivalent to git add --update
Further reading:
Git for beginners: The def...
How to get all child inputs of a div element (jQuery)
...ry/1.11.1/jquery.min.js"></script>
<div id="panel">
<table>
<tr>
<td><input id="Search_NazovProjektu" type="text" value="Naz Val" /></td>
</tr>
<tr>
<td><input id="Search_Popis" type="text" value="Po...
What is the use of the @Temporal annotation in Hibernate?
...on and you want to store precise date/time or both (TIMESTAMP) in database table.
The temporal precision is not specified in core Java APIs. @Temporal is a JPA annotation that converts back and forth between timestamp and java.util.Date. It also converts time-stamp into time. For example, in the s...