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What do querySelectorAll and getElementsBy* methods return?
Do getElementsByClassName (and similar functions like getElementsByTagName and querySelectorAll ) work the same as getElementById or do they return an array of elements?
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How can I use if/else in a dictionary comprehension?
...ntioning that you don't need to have an if-else condition for both the key and the value. For example, {(a if condition else b): value for key, value in dict.items()} will work.
– Jeremy Weirich
Jul 26 '16 at 19:41
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Do sessions really violate RESTfulness?
...client to server must contain all of the
information necessary to understand the request, and cannot take
advantage of any stored context on the server. Session state is
therefore kept entirely on the client.
according to the Fielding dissertation.
So server side sessions violate the state...
How do I do a multi-line string in node.js?
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node v4 and current versions of node
As of ES6 (and so versions of Node greater than v4), a new "template literal" intrinsic type was added to Javascript (denoted by back-ticks "`") which can also be used to construct multi-line str...
ExecJS and could not find a JavaScript runtime
I'm trying to use the Mongoid / Devise Rails 3.1 template ( Mongoid and Devise ), and I keep getting an error stating ExecJS cannot find a JavaScript runtime. Fair enough when I didn't have any installed, but I've tried installing Node.js , Mustang and the Ruby Racer , but nothing is work...
How do I Sort a Multidimensional Array in PHP [duplicate]
...a loaded into a multidimensional array. In this way each "row" is a record and each "column" contains the same type of data. I am using the function below to load my CSV file.
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What is the EAFP principle in Python?
...mmon Python coding style assumes the existence of valid keys or attributes and catches exceptions if the assumption proves false. This clean and fast style is characterized by the presence of many try and except statements. The technique contrasts with the LBYL style common to many other languages s...
Iterating each character in a string using Python
...for loop construct,
for example, open("file.txt") returns a file object (and opens the file), iterating over it iterates over lines in that file
with open(filename) as f:
for line in f:
# do something with line
If that seems like magic, well it kinda is, but the idea behind it is re...
Installing a dependency with Bower from URL and specify version
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This is a Git endpoint, and specifying the versioning works. If you specify for example a Javascript file directly, this does not work
– Edmondo1984
Oct 14 '13 at 4:51
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SQLite add Primary Key
... suggested solution is to create a new table with the correct requirements and copy your data into it, then drop the old table.
here is the official documentation about this: http://sqlite.org/faq.html#q11
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