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Uses for Optional
...tween wanting to use it everywhere something may be null , and nowhere at all.
14 Answers
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SQL keys, MUL vs PRI vs UNI
... non-unique index, then why does MUL show against only that column and not all other columns as well.?
– Vikas Goel
Jun 15 '19 at 23:23
2
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Java associative-array
...'t PHP more permissive with $arr[0]['name'] (I don't know this language at all)?
– Tomasz Nurkiewicz
Feb 25 '11 at 21:49
9
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jQuery ID starts with
I am trying to get all elements with an id starting with some value. Below is my jQuery code. I am trying to use a JavaScript variable when searching for items. But it does not work. What am I missing below? So the id 'value' am searching is the value of the clicked element
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When would you use delegates in C#? [closed]
...egister factory functions, for example:
myFactory.RegisterFactory(Widgets.Foo, () => new FooWidget());
var widget = myFactory.BuildWidget(Widgets.Foo);
I hope this helps!
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What is the difference between a symbolic link and a hard link?
... (Or is it multiple inodes? Not sure.)
A file in the file system is basically a link to an inode.
A hard link, then, just creates another file with a link to the same underlying inode.
When you delete a file, it removes one link to the underlying inode. The inode is only deleted (or deletable/ove...
How do exceptions work (behind the scenes) in c++
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Instead of guessing, I decided to actually look at the generated code with a small piece of C++ code and a somewhat old Linux install.
class MyException
{
public:
MyException() { }
~MyException() { }
};
void my_throwing_function(bool throwit)
{
if (...
Declare a block method parameter without using a typedef
...ally be preferred for more complicated cases.
– Fred Foo
Mar 30 '11 at 13:35
3
- ( void )myMethod...
Returning a C string from a function
...F-8 is an example of an mbcs. For the sake of intro, I quietly 'skip over' all of this.
Memory:
This means that a string like "my string" actually uses 9+1 (=10!) bytes. This is important to know when you finally get around to allocating strings dynamically.
So, without this 'terminating zero', y...
Do scala constructor parameters default to private val?
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In case classes all parameters will become "public" val.
– drexin
Feb 4 '13 at 20:21
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