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App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...序执行过程、跟踪变量值的方法，可以帮我们找到原因。问题出在输入等号之后，此时： 前数=计算结果 后数=0 算符=“”接下来输入算符，由于算符=“”，因此执行点击算符过程的“如果...则”分支，第一行代码为【前数=后数...
SQL injection that gets around mysql_real_escape_string()
...et_charset() / $mysqli->set_charset() / PDO's DSN charset parameter (in PHP ≥ 5.3.6)
OR
Don't use a vulnerable character set for connection encoding (you only use utf8 / latin1 / ascii / etc)
You're 100% safe.
Otherwise, you're vulnerable even though you're using mysql_real_escape_string().....
Can I define a class name on paragraph using Markdown?
...doesn't. Instead, you're stuck with language-specific Markdown supersets:
PHP: Markdown Extra
Ruby: Kramdown, Maruku
But if you need to abide by true Markdown syntax, you're stuck with inserting raw HTML, which is less ideal.
...
Biggest advantage to using ASP.Net MVC vs web forms
...wanted to go back to mixing code with content I'd look at developing using PHP which has a far more mature environment for that kind of development. If there are so many problems with ASP.NET then why not fix those issues?
Last but not least the new Razor engine means it is even harder to distingui...
Abort Ajax requests using jQuery
...abort the request.
var xhr = $.ajax({
type: "POST",
url: "some.php",
data: "name=John&location=Boston",
success: function(msg){
alert( "Data Saved: " + msg );
}
});
//kill the request
xhr.abort()
UPDATE:
As of jQuery 1.5 the returned object is a wrapper for the ...
How do I execute a string containing Python code in Python?
...//lucumr.pocoo.org/2011/2/1/exec-in-python/ (emphasis mine)
Python is not PHP
Don't try to circumvent Python idioms because some other language does it differently. Namespaces are in Python for a reason and just because it gives you the tool exec it does not mean you should use that tool.
It is da...
How to get the current taxonomy term ID (not the slug) in WordPress?
I've created a taxonomy.php page in my WordPress theme folder. I would like to get the current term id for a function.
How can I get this?
...
How to show math equations in general github's markdown(not github's blog)
...e following markdown syntax
it will display the following image
equation http://www.sciweavers.org/tex2img.php?eq=1%2Bsin%28mc%5E2%29&bc=White&fc...
Laravel: Get base url
...to('/');
App::make('url')->to('/');
Or inject the UrlGenerator:
<?php
namespace Vendor\Your\Class\Namespace;
use Illuminate\Routing\UrlGenerator;
class Classname
{
protected $url;
public function __construct(UrlGenerator $url)
{
$this->url = $url;
}
public...
Best way to store JSON in an HTML attribute?
...then how do I write it back in using jQuery in the same way that it was in PHP?
– BadHorsie
Sep 6 '11 at 16:01
...