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What's the difference between lists and tuples?
... tuples being immutable there is also a semantic distinction that should guide their usage. Tuples are heterogeneous data structures (i.e., their entries have different meanings), while lists are homogeneous sequences. Tuples have structure, lists have order.
Using this distinction makes code more...
How To Save Canvas As An Image With canvas.toDataURL()?
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This works great... But in Android (Default browser in Galaxy S3) it just doesn't download the image, but i get the message "Downloading..." forever.
– Habrashat
Jul 28 '14 at 6:05
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What is a “slug” in Django?
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A "slug" is a way of generating a valid URL, generally using data already obtained. For instance, a slug uses the title of an article to generate a URL. I advise to generate the slug by means of a function, given the title (or another piece of data), rather than...
How to use ArrayAdapter
...iew;
}
public MyClassAdapter(Context context, int textViewResourceId, ArrayList<MyClass> items) {
super(context, textViewResourceId, items);
}
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
conve...
MySQL Fire Trigger for both Insert and Update
...et easier maintenance and a guarantee that the two triggers' code won't accidentally diverge.
– derobert
Oct 9 '19 at 14:30
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show 1 more co...
REST APIs: custom HTTP headers vs URL parameters
...aves true metadata about the request for custom headers.
HTTP has a very wide selection of headers that cover most everything you'll need. Where I've seen custom headers come up is in a system to system request operating on behalf of a user. The proxy system will validate the user and add "X-User...
ReactJS Two components communicating
...alled on the onChange event to filter the list with the current value.
JSFiddle for #1 →
/** @jsx React.DOM */
var Filters = React.createClass({
handleFilterChange: function() {
var value = this.refs.filterInput.getDOMNode().value;
this.props.updateFilter(value);
},
render: functi...
How to use ssh agent forwarding with “vagrant ssh”?
...Vagrant.configure("2") do |config|
config.ssh.private_key_path = "~/.ssh/id_rsa"
config.ssh.forward_agent = true
end
config.ssh.private_key_path is your local private key
Your private key must be available to the local ssh-agent. You can check with ssh-add -L, if it's not listed add it with s...
How do I get NuGet to install/update all the packages in the packages.config?
...ink so without installing something like NuGet Power Tools - github.com/davidfowl/NuGetPowerTools. However that will do essentially the same thing as the auto-restore you already have.
– Matt Ward
Mar 10 '12 at 17:06
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Flask-SQLalchemy update a row's information
... you're still confused on the differences after reading through there, consider asking another question.
– Mark Hildreth
Jul 15 '11 at 15:36
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