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Why don't structs support inheritance?
...ings happen, as can be seen in C++.
Consider this pseudo-C# code:
struct Base
{
public int A;
}
struct Derived : Base
{
public int B;
}
void Square(Base[] values)
{
for (int i = 0; i < values.Length; ++i)
values [i].A *= 2;
}
Derived[] v = new Derived[2];
Square (v);
By nor...
How can I get the full/absolute URL (with domain) in Django?
...n your INSTALLED_APPS, it won't hit the DB at all, and provide information based on the Request object (see get_current_site)
– Darb
Jan 31 '12 at 10:04
...
C#对象序列化与反序列化 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
... public Programmer(string name, bool sex, string language)
: base(name, sex)
{
this.Language = language;
}
public override string ToString()
{
return base.ToString() + "\t编程语言：" + this.Language;
}
}
...
How to sort an array based on the length of each element?
...
Based on Salman's answer, I've written a small function to encapsulate it:
function sortArrayByLength(arr, ascYN) {
arr.sort(function (a, b) { // sort array by length of text
if (ascYN) return ...
Order of member constructor and destructor calls
... for
the constructor of the most derived
class as described below, virtual base
classes shall be initialized in the
order they appear on a depth-first
left-to-right traversal of the
directed acyclic graph of base
classes, where “left-to-right” is the
order of appearance of the base class
names i...
How to check if a string starts with a specified string? [duplicate]
...
Use the substr function to return a part of a string.
substr( $string_n, 0, 4 ) === "http"
If you're trying to make sure it's not another protocol. I'd use http:// instead, since https would also match, and other things such as http-protocol.com.
substr( $string_n, 0, 7 ) === "http://"
An...
Find in Files: Search all code in Team Foundation Server
...ems
.Where(i => !i.ServerItem.Contains("_ReSharper")); //skipping resharper stuff
foreach (var item in items)
{
List<string> lines = SearchInFile(item);
if (lines.Count &...
How to split a file into equal parts, without breaking individual lines? [duplicate]
...u need to know what that 75 should really be for N equal parts, its:
lines_per_part = int(total_lines + N - 1) / N
where total lines can be obtained with wc -l.
See the following script for an example:
#!/usr/bin/bash
# Configuration stuff
fspec=qq.c
num_files=6
# Work out lines per file.
t...
Fully custom validation error message with Rails
...(especially in non-english languages)? Do I really need to use errors.add :base, msg? I'd like to know which column the error is about, so I can display it at the correct form field.
– panzi
Feb 27 '13 at 18:34
...
Why do we not have a virtual constructor in C++?
... representing the class around instead of making your own), C++ is a class based language, and does not have objects representing any of the language's constructs. The class does not exist as an object at runtime, so you can't call a virtual method on it.
This fits with the 'you don't pay for what ...