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Java - Method name collision in interface implementation
...d ? I cannot even expect client code to be able to cast my instance to the appropriate interface , so am I not loosing something by this restriction ? Also note that in this way , when writing classes that actually implement the respective interfaces , we loose the benefit of having the code into a ...
Rails 4: before_filter vs. before_action
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It is just syntax difference, in rails app there is CRUD, and seven actions basically by name index, new, create, show, update, edit, destroy.
Rails 4 make it developer friendly to change syntax before filter to before action.
before_action call method before th...
Making a UITableView scroll when text field is selected
... full screen, especially on an iPad. There are hordes of examples of great apps that don't do that. For instance, many of Apple's own, including the Contacts app on the iPad.
– Bob Spryn
Jul 17 '11 at 1:44
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Firefox Web Console Disabled?
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This happens when the page itself defines a global variable called console, for example. If the page is browser-sniffing to decide whether to define it, the behavior could differ in different browsers.
In the case of Firefox it a...
Any way to make a WPF textblock selectable?
...xt="{Binding Text, Mode=OneWay}"
IsReadOnly="True"
TextWrapping="Wrap" />
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Draw on HTML5 Canvas using a mouse
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Here's the most straightforward way to create a drawing application with canvas:
Attach a mousedown, mousemove, and mouseup event listener to the canvas DOM
on mousedown, get the mouse coordinates, and use the moveTo() method to position your drawing cursor and the beginPath() m...
Java: splitting a comma-separated string but ignoring commas in quotes
...ec 2.7: "If double-quotes are used to enclose fields, then a double-quote appearing inside a field must be escaped by preceding it with another double quote" So, if String line = "equals: =,\"quote: \"\"\",\"comma: ,\"", all you need to do is strip off the extraneous double quote characters.
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Breakpoints are crossed out, how can I make them valid?
...re encountering what I encounter about once per year with Eclipse. There's apparently a bug in eclipse that causes this "Skip All Breakpoints" feature to turn ON all by itself even though you didn't actually turn it on.
– user2080225
May 11 '17 at 15:42
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If string is empty then return some default value
... with a model. If you wanted a reasonable default value everywhere in your app, you could (for example) override the address method for your User model.
I don't know ActiveRecord well enough to provide good code for this; in Sequel it would be something like:
class User < Sequel::Model
def ad...
Relational table naming convention [closed]
...of the two parent table names.
Note that is such cases the Verb Phrase applies to, and is read as, from parent to parent, ignoring the child table, because its only purpose in life is to relate the two parents.
Diagram_C
If it is not an Associative Table (ie. in addition to the two PKs, it con...