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Only mkdir if it does not exist [duplicate]
In my bash script I do:
5 Answers
5
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优化InnerHTML操作 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...如下：
<html>
<head>
<title>test</title>
</head>
<body>
<div>
<p>data<p>
</div>
<script>
document.onmousedown = function() {
for (var i = 0; i < 10; i++) {
var p = document.createElement("p");
p.appendChild(document.createTextNode(Math.random()));
d...
Django optional url parameters
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There are several approaches.
One is to use a non-capturing group in the regex: (?:/(?P&lt;title&gt;[a-zA-Z]+)/)?
Making a Regex Django URL Token Optional
Another, easier to follow way is to have multiple rules that matches your needs, all...
What's the purpose of SQL keyword “AS”?
You can set table aliases in SQL typing the identifier right after the table name.
9 Answers
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How to add a local repo and treat it as a remote repo
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Markdown `native` text alignment
Does markdown support native text-alignment without usage html + css ?
11 Answers
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LINQ to Entities does not recognize the method 'System.String ToString()' method, and this method ca
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Just save the string to a temp variable and then use that in your expression:
var strItem = item.Key.ToString();
IQueryable&lt;entity&gt; pages = from p in context.pages
where p.Serial == strItem
s...
PHP Difference between array() and []
...ely not frowned upon, at least not in 2019.
A good technical breakdown: https://softwareengineering.stackexchange.com/questions/151661/is-it-bad-practice-to-use-tag-in-php
A note in PSR-1: Files MUST use only &lt;?php and &lt;?= tags.
TL;DR: There is no reason you cannot or should not use it.
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Given an array of numbers, return array of products of all other numbers (no division)
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An explanation of polygenelubricants method is:
The trick is to construct the arrays (in the case for 4 elements)
{ 1, a[0], a[0]*a[1], a[0]*a[1]*a[2], }
{ a[1]*a[2]*a[3], a[2]*a[3], a[3], ...
Django filter queryset __in for *every* item in list
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...