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How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?
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@dev_feed In terms of database design I don't see the link back to be beneficial, but using the example above the link back could simplify finding a student given an address.
– edhedges
Sep 6 '14 at 23:23
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How can I get the sha1 hash of a string in node.js?
...ofJSON(['whatever'])
or
getSHA256ofJSON({'this':'too'})
Official node docs on crypto.createHash()
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How to pass parameters to ThreadStart method in Thread?
...implest is just
string filename = ...
Thread thread = new Thread(() => download(filename));
thread.Start();
The advantage(s) of this (over ParameterizedThreadStart) is that you can pass multiple parameters, and you get compile-time checking without needing to cast from object all the time.
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How to jump to top of browser page
...n issue with how you've styled your html and body tags. otherwise use $(window) instead.
– invot
Mar 3 '16 at 19:21
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GET URL parameter in PHP
...ince the variable might not exist, you could (and should) ensure your code does not trigger notices with:
<?php
if (isset($_GET['link'])) {
echo $_GET['link'];
} else {
// Fallback behaviour goes here
}
Alternatively, if you want to skip manual index checks and maybe add further valida...
Proper stack and heap usage in C++?
...ormance. It's lifespan: any local variable inside a function (anything you do not malloc() or new) lives on the stack. It goes away when you return from the function. If you want something to live longer than the function that declared it, you must allocate it on the heap.
class Thingy;
Thingy* fo...
Count immediate child div elements using jQuery
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Sometimes this does not work and you have to use $('#foo').children().size() which is faster anyway according to @mrCoder
– 472084
Sep 22 '11 at 9:45
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How to install lxml on Ubuntu
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Since you're on Ubuntu, don't bother with those source packages. Just install those development packages using apt-get.
apt-get install libxml2-dev libxslt1-dev python-dev
If you're happy with a possibly older version of lxml altogether though, y...
HTML tag want to add both href and onclick working
...ies is to execute the onclick, then follow the href as long as the onclick doesn't return false, canceling the event (or the event hasn't been prevented)
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Why are my basic Heroku apps taking two seconds to load?
...tays loaded until some time passes without anyone accessing it.
This is done to save server resources. If no one uses your app why keep resources busy and not let someone who really needs use them ?
If your app has a lot of continous traffic it will never be unloaded.
There is an official note a...