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How to implement Enums in Ruby?
...
I'm surprised that no one has offered something like the following (harvested from the RAPI gem):
class Enum
private
def self.enum_attr(name, num)
name = name.to_s
define_method(name + '?') do
@attrs & num != 0
end
...
C# - Multiple generic types in one list
...nor does it prevent a developer from shooting themselves in the foot by erroneously adding some non-MetaData object to the list. By using a List<MetaData> it is understood what the list should contain. Most likely MetaData will have some public properties/methods that haven't been shown in th...
Multiple INSERT statements vs. single INSERT with multiple VALUES
... up. This is the cut off point between the plan being an auto parametrized one (with 1,000 parameters) to a non parametrized one. Thereafter it seems to get linearly less efficient (in terms of number of value clauses processed in a given time).
Not sure why this should be. Presumably when it is co...
Technically what is the main difference between Oracle JDK and OpenJDK? [duplicate]
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Technical differences are a consequence of the goal of each one (OpenJDK is meant to be the reference implementation, open to the community, while Oracle is meant to be a commercial one)
They both have "almost" the same code of the classes in the Java API; but the code for the virtua...
What is stability in sorting algorithms and why is it important?
...stable sort algorithm, straw or spork may be interchanged, but in a stable one, they stay in the same relative positions (that is, since straw appears before spork in the input, it also appears before spork in the output).
We could sort the list of words using this algorithm: stable sorting by colu...
How to remove all null elements from a ArrayList or String Array?
...ll));
Read the Java API. The code will throw java.lang.UnsupportedOperationException for immutable lists (such as created with Arrays.asList); see this answer for more details.
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Is it possible to have multiple styles inside a TextView?
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In case, anyone is wondering how to do this, here's one way: (Thanks to Mark again!)
mBox = new TextView(context);
mBox.setText(Html.fromHtml("<b>" + title + "</b>" + "<br />" +
"<small>" + descript...
Loop through an array in JavaScript
... flow control statements
Cons
Too verbose
Imperative
Easy to have off-by-one errors (sometimes also called a fence post error)
2. Array.prototype.forEach
The ES5 specification introduced a lot of beneficial array methods, one of them, the Array.prototype.forEach and it gives us a concise way to i...
Does MySQL ignore null values on unique constraints?
...S NOT NULL seems to fail me as it not supported in my version of MySQL. Anyone know where I could look?
– newdark-it
Nov 20 '18 at 17:13
1
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What is a bus error?
...ust at Exercise 9 from How to Learn C the Hard Way and already encountered one...
– 11684
Mar 26 '13 at 20:12
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