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Reference — What does this symbol mean in PHP?
... & $b;
This would output the number 8. Why? Well let's see using our table example.
-------------------------------------------
| 1 Byte ( 8 bits ) |
-------------------------------------------
|Place Value | 128| 64| 32| 16| 8| 4| 2| 1|
----------------------------...
What does the construct x = x || y mean?
...se {
return false;
}
}
If you still don't understand, look at this table:
| true false
------+---------------
true | true true
false | true false
In other words, it's only false when both values are false.
How is it different in JavaScript?
JavaScript is a bit differ...
Referring to a Column Alias in a WHERE Clause
...done with parenthesis to force logical order of operation or with a Common Table Expression (CTE):
Parenthesis/Subselect:
SELECT
*
FROM
(
SELECT
logcount, logUserID, maxlogtm,
DATEDIFF(day, maxlogtm, GETDATE()) AS daysdiff
FROM statslogsummary
) as innerTable
WHERE daysdiff...
Is iterating ConcurrentHashMap values thread safe?
...nsertions or removals that occurred since the iterator was constructed. No table-wide locking is needed (or even possible) to provide thread-safety when iterating the collection. ConcurrentHashMap may be used as a replacement for synchronizedMap or Hashtable in any application that does not rely on ...
How to float 3 divs side by side using CSS?
...
The modern way is to use the CSS flexbox, see support tables.
.container {
display: flex;
}
.container > div {
flex: 1; /*grow*/
}
<div class="container">
<div>Left div</div>
<div>Middle div</div>
<div>Right div<...
What resources are shared between threads?
...
yes - i'm wondering whether it is acceptable to access memory in other stacks between threads? As long as you are sure you're not trying to reference a stack that has been deallocated I'm not sure I see a problem with it?
– bph
...
How to get a DOM Element from a JQuery Selector
...
You can access the raw DOM element with:
$("table").get(0);
or more simply:
$("table")[0];
There isn't actually a lot you need this for however (in my experience). Take your checkbox example:
$(":checkbox").click(function() {
if ($(this).is(":checked")) {
/...
What is the use of GO in SQL Server Management Studio & Transact SQL?
...5 it seems that you can use GO with an int parameter, like:
INSERT INTO mytable DEFAULT VALUES
GO 10
The above will insert 10 rows into mytable. Generally speaking, GO will execute the related sql commands n times.
share
...
UnboundLocalError on local variable when reassigned after first use
...nitialized. In a fully compiled language, it would just go into the symbol table and wait for the parse, but since it WON'T have the luxury of a second pass, the lexer does a little extra work to make life easier later on. Only, then it sees the OPERATOR, sees that the rules say "if you have an op...
Best XML parser for Java [closed]
...g parser implementation in a standard way. The code should be much more portable, and when you realise that a specific parser has grown too old, you can replace it with another without changing a line of your code (if you do it correctly).
Basically there are three ways of handling XML in a standar...