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PHP: exceptions vs errors?
... of code that will insert a row into a database. It is possible that this call fails (duplicate ID) - you will want to have a "Error" which in this case is an "Exception". When you are inserting these rows, you can do something like this
try {
$row->insert();
$inserted = true;
} catch (Exc...
Javascript when to use prototypes
...he problem with JavaScript is that naked constructor functions require the caller to remember to prefix them with new or otherwise they typically don't work. There is no good reason for this. jQuery gets it right by hiding that nonsense behind an ordinary function, $, so you don't have to care how t...
Guaranteed lifetime of temporary in C++?
...for the lifetime of a temporary variable that is created within a function call but not used as a parameter? Here's an example class:
...
Numpy `logical_or` for more than two arguments
... 'logical_or'>
You can of course chain together multiple logical_or calls like this:
>>> x = np.array([True, True, False, False])
>>> y = np.array([True, False, True, False])
>>> z = np.array([False, False, False, False])
>>> np.logical_or(np.logical_or(x,...
What is scope/named_scope in rails?
... whats the advantages of this over say defining a method in the User Class called 'subscribedUsers'? e.g. 'def self.subscribedUsers self.where(:subscribed_to_newsletter => true) end
– redroot
Apr 29 '11 at 9:05
...
How do you check if a selector matches something in jQuery? [duplicate]
...y poor code design if you are doing math on the return value of a function called exists... IMHO :) Actually adding a one-liner extension, like exists() that is 2 characters longer than what it replaces is silly to begin with for JS! :)
– Gone Coding
Sep 15 '15...
AngularJS : The correct way of binding to a service properties
... find myself having to modify markup and controller logic when changes are called for, anyway. So the extra effort of writing the API negates it's advantage.
-1 Furthermore, this approach isn't very DRY.
-1 If you want to bind the data to ng-model your code become even less DRY as you have to re-pac...
How to use ng-repeat for dictionaries in AngularJs?
... following simple example would work (assuming dictionary is in a variable called d):
my.component.ts:
keys: string[] = []; // declaration of class member 'keys'
// component code ...
this.keys = Object.keys(d);
my.component.html: (will display list of key:value pairs)
<ul *ngFor="let key...
rails simple_form - hidden field - create?
...t_comes_through_in_your_form
Where :method is the method that when called on the object results in the value you want
So following the example above:
= simple_form_for @movie do |f|
= f.hidden :title, "some value"
= f.button :submit
The code used in the example will reset the value ...
What's invokedynamic and how do I use it?
...It is a new JVM instruction which allows a compiler to generate code which calls methods with a looser specification than was previously possible -- if you know what "duck typing" is, invokedynamic basically allows for duck typing. There's not too much you as a Java programmer can do with it; if you...