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Reading binary file and looping over each byte
...
# Do stuff with byte.
byte = f.read(1)
python 3.8
From now on thanks to := operator the above code can be written in a shorter way.
with open("myfile", "rb") as f:
while (byte := f.read(1)):
# Do stuff with byte.
...
How is attr_accessible used in Rails 4?
...
Rails 4 now uses strong parameters.
Protecting attributes is now done in the controller. This is an example:
class PeopleController < ApplicationController
def create
Person.create(person_params)
end
private
def pe...
HTML input textbox with a width of 100% overflows table cells
Does anyone know why the input elements with a width of 100% go over the table's cells border.
14 Answers
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Identifying the dependency relationship for python packages installed with pip
...:|Requires:)' | sed s/Name:/\\\nName:/ -- but it seems that pipdeptree is now a better solution.
– Mark Chackerian
Aug 3 '17 at 15:26
add a comment
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How can I tell if a DOM element is visible in the current viewport?
...eed to support version of Internet Explorer before 7.
Original solution (now outdated):
This will check if the element is entirely visible in the current viewport:
function elementInViewport(el) {
var top = el.offsetTop;
var left = el.offsetLeft;
var width = el.offsetWidth;
var height = ...
HTML minification? [closed]
...kind of hard to automate the process and definitely required some skills. Knowing that a lot of high level sites even right now are not using gzip (which is trivial), it is understandable that people were reluctant in minifying html.
So why were people minifying js, but not html? When you minify JS...
What is console.log?
...ve them all in one answer.
Firefox
http://getfirebug.com/
(you can also now use Firefox's built in developer tools Ctrl+Shift+J (Tools > Web Developer > Error Console), but Firebug is much better; use Firebug)
Safari and Chrome
Basically the same.
https://developers.google.com/chrome-dev...
Can you list the keyword arguments a function receives?
...argspec(func)
(['a', 'b', 'c'], 'args', 'kwargs', (42,))
If you want to know if its callable with a particular set of args, you need the args without a default already specified. These can be got by:
def getRequiredArgs(func):
args, varargs, varkw, defaults = inspect.getargspec(func)
if ...
What is cURL in PHP?
...a library that lets you make HTTP requests in PHP. Everything you need to know about it (and most other extensions) can be found in the PHP manual.
In order to use PHP's cURL functions
you need to install the » libcurl
package. PHP requires that you use
libcurl 7.0.2-beta or higher. In PH...
Performance of Arrays vs. Lists
...sy to measure...
In a small number of tight-loop processing code where I know the length is fixed I use arrays for that extra tiny bit of micro-optimisation; arrays can be marginally faster if you use the indexer / for form - but IIRC believe it depends on the type of data in the array. But unless ...