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Does adding a duplicate value to a HashSet/HashMap replace the previous value
...
It the case of HashSet, it does NOT replace it.
From the docs:
http://docs.oracle.com/javase/6/docs/api/java/util/HashSet.html#add(E)
"Adds the specified element to this set if it is not already present. More formally, adds the specified element e to this set if this set...
What's the difference between a catalog and a schema in a relational database?
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From the relational point of view :
The catalog is the place where--among other things--all of the various schemas (external, conceptual, internal) and all of the corresponding mappings (external/conceptual, conceptual/i...
Difference between innerText, innerHTML, and childNodes[].value?
...etElementById('example-input').value //=> "something"
</script>
From the docs:
Note: for certain input types the returned value might not match the
value the user has entered. For example, if the user enters a
non-numeric value into an <input type="number">, the returned val...
Why does instanceof return false for some literals?
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Primitives are a different kind of type than objects created from within Javascript. From the Mozilla API docs:
var color1 = new String("green");
color1 instanceof String; // returns true
var color2 = "coral";
color2 instanceof String; // returns false (color2 is not a String object)
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Why doesn't a python dict.update() return the object?
...kes extensive use of chaining. Its not discouraged, you could even inherit from dict and only override update to do update and return self, if you really want it.
class myDict(dict):
def update(self, *args):
dict.update(self, *args)
return self
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Creating a UICollectionView programmatically
...nView];
// Do any additional setup after loading the view, typically from a nib.
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return 15;
}
// The cell that is returned must be retrieved from a call to -dequeueReusableCellWit...
Java 8: How do I work with exception throwing methods in streams?
...to be a wrapper method I would declare it static. It does not use anything from 'this'.
– aalku
May 13 '14 at 15:18
219
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Predicate Delegates in C#
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Leading on from Andrew's answer with regards to c#2 and c#3 ... you can also do them inline for a one off search function (see below).
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
...
log4net not working
...onfigurator] method doesn't work with app.config. If you configure log4net from app.config, you must use the log4net.Config.XmlConfigurator.Configure() method.
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Passing A List Of Objects Into An MVC Controller Method Using jQuery Ajax
...}
public string Color { get; set; }
}
There are two things I learned from this:
The contentType and dataType settings are absolutely necessary in the ajax() function. It won't work if they are missing. I found this out after much trial and error.
To pass in an array of objects to an MVC con...