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How do I do an OR filter in a Django query?
...o.db.models import Q
query = Q(first_name='mark')
query.add(Q(email='mark@test.com'), Q.OR)
query.add(Q(last_name='doe'), Q.AND)
queryset = User.objects.filter(query)
This ends up with a query like :
(first_name = 'mark' or email = 'mark@test.com') and last_name = 'doe'
This way there is no n...
How can I perform a str_replace in JavaScript, replacing text in JavaScript?
...unlikely to beat indexing into a string in the common case.
For a simple test run on the JS perf page, I've documented some of the results:
<script>
// Setup
var startString = "xxxxxxxxxabcxxxxxxabcxx";
var endStringRegEx = undefined;
var endStringString = undefined;
var en...
how to convert array values from string to int?
...
but if you have string 'test', you got: array([0]=> 0 )
– Dmitry Dubovitsky
Oct 9 '13 at 13:39
10
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Stop form refreshing page on submit
...rom refreshing even if there is a Javascript error which can be useful for testing and development.
– jjz
Apr 30 '14 at 19:47
14
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What's the scope of the “using” declaration in C++?
...namespaces all being used by one "conglomerator"-type file, and gmock unit-testing was extra tedious because each test used things from a specific namespace, and I thought I had to qualify each and every variable. Using using inside a function (or even a gtest TEST macro!) makes my life so much bett...
When would you call java's thread.run() instead of thread.start()?
...
You might want to call run() in a particular unit test that is concerned strictly with functionality and not with concurrency.
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jQuery scroll to element
... article Smoothly scroll to an element without a jQuery plugin. And I have tested it on the example below.
<html>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
<script>
$(document).ready(function (){
...
Sending a mail from a linux shell script
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cat << END ... END | mail -s "subject" test@example.com
– ulidtko
Nov 13 '17 at 13:21
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How can I check if a command exists in a shell script? [duplicate]
...)) (zsh only)
You can put any of them to your if clause. According to my tests (https://www.topbug.net/blog/2016/10/11/speed-test-check-the-existence-of-a-command-in-bash-and-zsh/), the 1st and 3rd method are recommended in bash and the 5th method is recommended in zsh in terms of speed.
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Detecting input change in jQuery?
...a in an input field does not trigger a MutationObserver change...I setup a test case, only a JS code change to the innerText or value attribute (simulating user input) will trigger a MutationObserver event jsfiddle.net/pxfunc/04chgpws/1 (see the console.log for MutationObserver event logging). Do y...