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Learning Python from Ruby; Differences and Similarities
...rate using multiple indexes. For example, to find all the palindromes in a string (assuming you have a function p() that returns true for palindromes), all you need is a single list comprehension:
s = 'string-with-palindromes-like-abbalabba'
l = len(s)
[s[x:y] for x in range(l) for y in range(x,l+1...
How to paste yanked text into the Vim command line
...u cannot live without them.
Registers are basically storage locations for strings. Vim has many registers that work in different ways:
0 (yank register: when you use y in normal mode, without specifying a register, yanked text goes there and also to the default register),
1 to 9 (shifting delete ...
What is CDATA in HTML? [duplicate]
...created by others over which we have no control? Or just resort to manual string fiddling?
– user2895783
Jun 9 '16 at 11:07
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Why does Enumerable.All return true for an empty sequence? [duplicate]
The code creates an empty collection of string, then tries to determine if all the elements in the collection are "ABC".
If you run it, b will be true.
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Bootstrap with jQuery Validation Plugin
I am trying to add validation to my form with jQuery Validation Plugin, but I'm having a problem where the plugin puts the error messages when I'm using input groups.
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Get the value in an input text box
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i did this but having issues.
– Wasey Raza
Oct 11 '18 at 11:55
add a comment
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file_put_contents - failed to open stream: Permission denied
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@MajidFouladpour I think chmod +x /parent/directory, for every parent directory of the target. chmod +x /parent/directory, chmod +x /parent, etc.
– Erhannis
Sep 17 '14 at 1:11
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Preferred Java way to ping an HTTP URL for availability
...her feasible way is using java.net.Socket.
public static boolean pingHost(String host, int port, int timeout) {
try (Socket socket = new Socket()) {
socket.connect(new InetSocketAddress(host, port), timeout);
return true;
} catch (IOException e) {
return false; // Ei...
Backbone.View “el” confusion
...r want to see it do anything.
An example:
I have a view that creates individual items
window.ItemView = Backbone.View.extend({
tagName: "li", //this defaults to div if you don't declare it.
template: _.template("<p><%= someModelKey %></p>"),
events: {
//this...
Difference between Key, Primary Key, Unique Key and Index in MySQL
... A primary key is a column, or a combination of columns, that can uniquely identify a row. It is a special case of unique key. A table can have at most one primary key, but more than one unique key. When you specify a unique key on a column, no two distinct rows in a table can have the same value.
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