大约有 31,840 项符合查询结果（耗时：0.0249秒） [XML]
What is the meaning of the term “thread-safe”?
...hared data, and the need for a shared piece of data to be accessed by only one thread at any given time.
There are a few ways to achieve thread safety:
Re-entrancy:
Writing code in such a way that it can be partially executed by one task, reentered by another task, and then resumed f...
All possible array initialization syntaxes
... third line must be written as displayed, as array initialization syntax alone is not enough to satisfy the compiler's demands. The fourth could also use inference. So if you're into the whole brevity thing, the above could be written as
var array = new string[2]; // creates array of length 2, defa...
Create unique constraint with null columns
... (user_id, recipe_id)
WHERE menu_id IS NULL;
This way, there can only be one combination of (user_id, recipe_id) where menu_id IS NULL, effectively implementing the desired constraint.
Possible drawbacks: you cannot have a foreign key referencing (user_id, menu_id, recipe_id), you cannot base CLU...
Why are Standard iterator ranges [begin, end) instead of [begin, end]?
Why does the Standard define end() as one past the end, instead of at the actual end?
7 Answers
...
MSBUILD : error MSB1008: Only one project can be specified
... know this is an old post, but I feel like I needed to share this with someone :-)
share
|
improve this answer
|
follow
|
...
Check if checkbox is checked with jQuery
... value="Bananas" />
</fieldset>
And now the jQuery:
var atLeastOneIsChecked = $('#checkArray:checkbox:checked').length > 0;
//there should be no space between identifier and selector
// or, without the container:
var atLeastOneIsChecked = $('input[name="chk[]"]:checked').length >...
What should I do if two libraries provide a function with the same name generating a conflict?
...
If you control one or both: edit one to change the name and recompile Or equivalently see Ben and unknown's answers which will work without access to the source code.
If you don't control either of them you can wrap one of them up. That is ...
When should I use Arrow functions in ECMAScript 6?
...ion:
var x = () => {};
new x(); // TypeError: x is not a constructor
One key advantage of functions over arrow functions is therefore that functions double as object constructors:
function Person(name) {
this.name = name;
}
However, the functionally identical2 ES Harmony draft class def...
TransactionScope automatically escalating to MSDTC on some machines?
...
SQL Server 2008 can use multiple SQLConnections in one TransactionScope without escalating, provided the connections are not open at the same time, which would result in multiple "physical" TCP connections and thus require escalation.
I see some of your developers have SQL S...
What is the difference between Factory and Strategy patterns?
Can any one explain the difference between factory and strategy patterns?
12 Answers
...