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How to implement a rule engine?
...Rules = rules.Select(r => CompileRule(r)).ToList();
public bool MatchesAllRules(User user)
{
return compiledRules.All(rule => rule(user));
}
Here is the implementation of BuildExpr:
Expression BuildExpr(Rule r, ParameterExpression param)
{
var left = MemberExpression.Property(param, ...
Default value in Doctrine
...put field values are blank, then it will set the Entity property to null.
http://symfony.com/doc/current/book/forms.html#handling-form-submissions
My Workaround
Set the default value on your controller after form->handleRequest() inside your form->isValid() method:
...
if ($myEntity->ge...
Installing python module within code
I need to install a package from PyPi straight within my script.
Maybe there's some module or distutils ( distribute , pip etc.) feature which allows me to just execute something like pypi.install('requests') and requests will be installed into my virtualenv.
...
Converting JavaScript object with numeric keys into array
...3","3":"4"};
var arr = [];
for (elem in obj) {
arr.push(obj[elem]);
}
http://jsfiddle.net/Qq2aM/
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How can I maximize a split window?
... a reputable source, I'm going to hold that as your personal preference, really. I'm usually not using them, but I've recently found I'm using them for thigns like this (maximizing a sidebuffer temporarily; doing power stuff like having multiple disjoint side-by-side diffs in a single vim session). ...
Creating a config file in PHP
...nfo' => array(
'appName'=>"App Name",
'appURL'=> "http://yourURL/#/"
)
);
?>
So your database's info stays on the server side, but your app info is accessible from your JavaScript, with for example a $http.get('get_app_info.php').then(...); type of call.
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Multi-statement Table Valued Function vs Inline Table Valued Function
...e compiler cannot use any table statistics on the tables in the MSTVF. So, all things being equal, (which they rarely are), the ITVF will perform better than the MSTVF. In my tests, the performance difference in completion time was negligible however from a statistics standpoint, it was noticeable.
...
How to output a multiline string in Bash?
How can I output a multipline string in Bash without using multiple echo calls like so:
7 Answers
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Is there some way to PUSH data from web server to browser?
...
Yes, what you're looking for is COMET http://en.wikipedia.org/wiki/Comet_(programming). Other good Google terms to search for are AJAX-push and reverse-ajax.
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Creating a textarea with auto-resize
...o';
this.style.height = (this.scrollHeight) + 'px';
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<textarea placeholder="Type, paste, cut text here...">PRELOADED TEXT.
This javascript should now add better support for IOS browsers ...