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Count, size, length…too many choices in Ruby?
...,3].count{|x| x > 2 }
=> 1
In the case where you don't provide a parameter to count it has basically the same effect as calling length. There can be a performance difference though.
We can see from the source code for Array that they do almost exactly the same thing. Here is the C code fo...
Choose File Dialog [closed]
...electDirectoryOption;
private String fileEndsWith;
/**
* @param activity
* @param initialPath
*/
public FileDialog(Activity activity, File initialPath) {
this(activity, initialPath, null);
}
public FileDialog(Activity activity, File initialPath, String ...
What is this Javascript “require”?
...erver();
app.get('/beatles/:name', function(req, res) {
var name = req.params.name || '';
name = name.replace(/[^a-zA_Z]/, '');
if (!name.length) {
res.send({});
} else {
var query = client.query('SELECT * FROM BEATLES WHERE name =\''+name+'\' LIMIT 1');
var d...
Recursion in Angular directives
... * Manually compiles the element, fixing the recursion loop.
* @param element
* @param [link] A post-link function, or an object with function(s) registered via pre and post properties.
* @returns An object containing the linking functions.
*/
compile: f...
What are enums and why are they useful?
...
You should always use enums when a variable (especially a method parameter) can only take one out of a small set of possible values. Examples would be things like type constants (contract status: "permanent", "temp", "apprentice"), or flags ("execute now", "defer execution").
If you use e...
What is the explicit promise construction antipattern and how do I avoid it?
...tly. Your code in getStuffDone can be rewritten as:
function getStuffDone(param){
return myPromiseFn(param+1); // much nicer, right?
}
Promises are all about making asynchronous code more readable and behave like synchronous code without hiding that fact. Promises represent an abstraction ove...
Declaring a custom android UI element using XML
... This answer is the clearest resource on the Internet on custom XML params that I was able to find. Thank you, Casebash.
– Artem Russakovskii
Oct 8 '11 at 1:34
...
Default function arguments in Rust
...
Another way could be to declare an enum with the optional params as variants, which can be parameterized to take the right type for each option. The function can be implemented to take a variable length slice of the enum variants. They can be in any order and length. The defaults ar...
Adding parameter to ng-click function inside ng-repeat doesn't seem to work
...description }}</div>
</div>
Note the value of ng-click. The parameter passed to goTo() is a string from a property of the binding object (the button), but it is not wrapped in quotes. Looks like AngularJS handles that for us. I got hung up on that for a few minutes.
...
Sort JavaScript object by key
...ct.keys().
// Array.prototype.reduce() takes one callback
// (and another param look at the last line) and passes 4 arguments to it:
// accumulator, currentValue, currentIndex and array
.reduce((accumulator, currentValue) => {
// setting the accumulator (sorted new object) with the actual pr...