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Why JSF saves the state of UI components on server?
...t of codes and projects which unnecessarily duplicates the entire database table into Java's memory in flavor of a session scoped bean where Java is been used instead of SQL to filter/group/arrange the records. With ~1000 records, that would easily go over 10MB per user session.
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What's an object file in C?
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A linker takes all these object files and combines them to form one executable (assuming that it can, ie: that there aren't any duplicate or undefined symbols). A lot of compilers will do this for you (read: they run the linker on their own) if you don't tell them to "just compile" using command-...
How do I parse command line arguments in Bash?
...hosts', Leftovers: foo bar
The advantages of getopts are:
It's more portable, and will work in other shells like dash.
It can handle multiple single options like -vf filename in the typical Unix way, automatically.
The disadvantage of getopts is that it can only handle short options (-h, not...
How to have no pagebreak after \include in LaTeX
...ent. The others will not show up, but are considered for counters, labels, tables of contents when the corresponding aux files are included.
In other words, by using include and includeonly one can keep the compile time short in a draft while having correct references.
Further reading on Wikibooks....
TCP 的那些事儿（上） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...给destory掉，然后在日志里打一个警告（如：time wait bucket table overflow），官网文档说这个参数是用来对抗DDoS攻击的。也说的默认值180000并不小。这个还是需要根据实际情况考虑。
Again，使用tcp_tw_reuse和tcp_tw_recycle来解决TIME_W...
How to update SQLAlchemy row entry?
Assume table has three columns: username , password and no_of_logins .
5 Answers
5...
What is the benefit of using “SET XACT_ABORT ON” in a stored procedure?
... face is data purity: sometimes the parameters received or the data in the tables are just plain wrong, resulting in duplicate key errors, referential constrain errors, check constrain errors and so on and so forth. After all, that's exactly the role of these constrains, if these data purity errors ...
Entity Framework DateTime and UTC
...);
}
/// <inheritdoc />
public override DataTable GetSchemaTable()
{
return source.GetSchemaTable();
}
/// <inheritdoc />
public override Stream GetStream(int ordinal)
{
return source.GetStream(ordi...
When to use ' (or quote) in Lisp?
...where you in other languages would have used strings, such as keys to hash tables.
This is where quote comes in. Say you want to plot resource allocations from a Python application, but rather do the plotting in Lisp. Have your Python app do something like this:
print("'(")
while allocating:
...
In Django, how does one filter a QuerySet with dynamic field lookups?
... right. It sounds like the "field" is actually a key to a row in another table, not a column.
Specific filter buttons. Wait... That's the way the Django admin works. Specific filters are turned into buttons. And the same analysis as above applies. A few filters make sense. A large number of ...