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JavaScript Form Submit - Confirm or Cancel Submission Dialog Box
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Samuel Liew♦Samuel Liew
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Can I query MongoDB ObjectId by date?
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Popping Timestamps into ObjectIds covers queries based on dates embedded in the ObjectId in great detail.
Briefly in JavaScript code:
/* This function returns an ObjectId embedded with a given datetime */
/* Accepts both Date object and string input */
function objectIdWit...
Cannot kill Python script with Ctrl-C
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Is it possible to declare two variables of different types in a for loop?
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C++14: You can do the same as C++11 (below) with the addition of type-based std::get. So instead of std::get<0>(t) in the below example, you can have std::get<int>(t).
C++11: std::make_pair allows you to do this, as well as std::make_tuple for more than two objects.
for (auto p ...
What differences, if any, between C++03 and C++11 can be detected at run-time?
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bool isCpp0x() {
auto x(y);
return (y.z == 1);
}
The following is based on the fact that operator int&& is a conversion function to int&& in C++0x, and a conversion to int followed by logical-and in C++03
struct Y { bool x1, x2; };
struct A {
operator int();
template&l...
How do I change the font size of a UILabel in Swift?
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YannStephYannSteph
9,04033 gold badges4646 silver badges4242 bronze badges
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What's the difference between using “let” and “var”?
...tatement.
If you're writing client-side JavaScript code and use a browser based transpiler (like Traceur or babel-standalone), you can safely use the let statement, however your code is likely to be anything but optimal with respect to performance.
If you're writing client-side JavaScript code and...
Use email address as primary key?
.... However, this does not matter if you simply retrieve a user from the database using the e-mail address. It does matter if you have complex queries with multiple joins.
If you store information about users in multiple tables, the foreign keys to the users table will be the e-mail address. That mea...
How to prevent form resubmission when page is refreshed (F5 / CTRL+R)
...ng redirects) you can hash some of the request parameters to make a string based on the content and then check that you haven't sent it already.
//create digest of the form submission:
$messageIdent = md5($_POST['name'] . $_POST['email'] . $_POST['phone'] . $_POST['comment']);
//and check it ...
What's the difference between dynamic (C# 4) and var?
...h dynamic, properties / methods / operators / etc are resolved at runtime, based on the actual object. Very handy for talking to COM (which can have runtime-only properties), the DLR, or other dynamic systems, like javascript.
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