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What happens to a declared, uninitialized variable in C? Does it have a value?
If in C I write:
10 Answers
10
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MySQL: Insert record if not exists in table
...Rupert | Somewhere | 022 |
+----+--------+-----------+------+
Insert a different record:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'John', 'Doe', '022') AS tmp
WHERE NOT EXISTS (
SELECT name FROM table_listnames WHERE name = 'John'
) LIMIT 1;
Query OK, 1 row af...
Modelling an elevator using Object-Oriented Analysis and Design [closed]
...all active elevators (not in maintenance).
The scheduling will be like:
if available pick a standing elevator for this floor.
else pick an elevator moving to this floor.
else pick a standing elevator on an other floor.
else pick the elevator with the lowest load.
Each elevator has a set of stat...
How do I check if a property exists on a dynamic anonymous type in c#?
... public static bool IsPropertyExist(dynamic settings, string name)
{
if (settings is ExpandoObject)
return ((IDictionary<string, object>)settings).ContainsKey(name);
return settings.GetType().GetProperty(name) != null;
}
var settings = new {Filename = @"c:\temp\q.txt"};
...
Compare version numbers without using split function
...w Version(v2);
var result = version1.CompareTo(version2);
if (result > 0)
Console.WriteLine("version1 is greater");
else if (result < 0)
Console.WriteLine("version2 is greater");
else
Console.WriteLine("versions are equal");
...
How should I cast in VB.NET?
...
Those are all slightly different, and generally have an acceptable usage.
var.ToString() is going to give you the string representation of an object, regardless of what type it is. Use this if var is not a string already.
CStr(var) is the VB stri...
Best practices: throwing exceptions from properties
... are always safe to call. They recommend redesigning getters to be methods if exceptions are something you need to throw. For setters they indicate that exceptions are an appropriate and acceptable error handling strategy.
For indexers, Microsoft indicates that it is acceptable for both getters and...
JSON left out Infinity and NaN; JSON status in ECMAScript?
...nge situation where objects that would otherwise be serializable, are not, if they contain NaN or +/- infinity values.
9 An...
How to check if a String contains any of some strings
I want to check if a String s, contains "a" or "b" or "c", in C#.
I am looking for a nicer solution than using
14 Answers
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Is Java's assertEquals method reliable?
...)
Here is a link to a great Stackoverflow question regarding some of the differences between == and .equals().
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