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Difference between a theta join, equijoin and natural join
...bly joined tables in the system. Take very common columns such as "name", "description", ... Using "natural join" will make them joined whereas it makes nonsense and more is against business logic and leads to error. So yes, "natural join" is dangerous. It forces you to have distinct names except fo...
Why do you need to create a cursor when querying a sqlite database?
...for that matter), and this just completely stumps me. The abundant lack of descriptions of cursor objects (rather, their necessity) also seems odd.
...
How to “comment-out” (add comment) in a batch/cmd?
...ted code blocks (only on the first character): robvanderwoude.com/comments.php
– Michael Paulukonis
Sep 12 '14 at 13:04
...
Accessing private member variables from prototype-defined functions
...short, you can use the new Symbol to create private fields.
Here's a great description: https://curiosity-driven.org/private-properties-in-javascript
Example:
var Person = (function() {
// Only Person can access nameSymbol
var nameSymbol = Symbol('name');
function Person(name) {
...
How to create default value for function argument in Clojure
...he default function a different name (decimal, hex, etc) which may be more descriptive and/or a different scope (var, local). The partial function can also be mixed with some of the approaches above if desired:
(defn string->integer
([s] (string->integer s 10))
([base s] (Integer/parseIn...
Extract hostname name from string
... ==");
console.log(extractHostname("http://www.blog.classroom.me.uk/index.php"));
console.log(extractHostname("http://www.youtube.com/watch?v=ClkQA2Lb_iE"));
console.log(extractHostname("https://www.youtube.com/watch?v=ClkQA2Lb_iE"));
console.log(extractHostname("www.youtube.com/watch?v=ClkQA2Lb...
技术人员如何去面试？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...。
技术面试不同的技术应该问的问题都不相同，比如你PHP、Java、C++、数据库每个技术点不同，出的面试题自然不同，最好你在找工作的时候就选择跟你个人擅长技术比较符合的职位。
技术面试的流程是一面简单问题(基础知识...
What does principal end of an association means in 1:1 relationship in Entity framework
...is kind of ironic. In this case, Principal is Bar. WithOptionalDependent() description on msdn makes it more clear.
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How can I style an Android Switch?
...roid-holo-colors.com/ (dead link) linked from Android Asset Studio
A good description of all the tools are at AndroidOnRocks.com (site offline now)
However, I highly recommend everybody to read the reply from Janusz as it will make understanding clearer. Use the tool to do stuffs real quick
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CSS last-child(-1)
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Unless you can get PHP to label that element with a class you are better to use jQuery.
jQuery(document).ready(function () {
$count = jQuery("ul li").size() - 1;
alert($count);
jQuery("ul li:nth-child("+$count+")").css("color","red");
}...