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How to save/restore serializable object to/from file?
... and I know that the object has to be Serializable . But it would be nice if I can get an example. For example if I have the following:
...
Where's the difference between setObject:forKey: and setValue:forKey: in NSMutableDictionary?
When looking at the documentation, I hardly see any big difference. Both "value" and "object" are of type id , so can be any object. Key is once a string, and in the other case an id. One of them seems to retain the object, and the other don't. What else? Which one is for what case?
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Strip Leading and Trailing Spaces From Java String
...t for Java 11's String.strip(). I haven't had time to explore the subtle differences.
– Josiah Yoder
May 14 at 12:53
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String Concatenation using '+' operator
...get it all done in one go.
EDIT: Note that the compiler can't do anything if you concatenate in a loop. For example, this code:
string x = "";
foreach (string y in strings)
{
x += y;
}
just ends up as equivalent to:
string x = "";
foreach (string y in strings)
{
x = string.Concat(x, y);...
How to empty a redis database?
... (and add some fun with it) during the last fews days and I'd like to know if there is a way to empty the db (remove the sets, the existing key....) easily.
During my tests, I created several sets with a lot of members, even created sets that I do not remember the name (how can I list those guys t...
Find and kill a process in one line using bash and regex
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There is one small issue - if the process has already been terminated, this line of kill will churn out with the standard output kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
– Lionel...
Emacs bulk indent for Python
Working with Python in Emacs if I want to add a try/except to a block of code, I often find that I am having to indent the whole block, line by line. In Emacs, how do you indent the whole block at once.
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Which MIME type to use for a binary file that's specific to my program?
...rs are recognised by the browser for the purpose of a (fast) possible identifying a handler to use the downloaded file as target, for example, PDF would be downloaded and your Adobe Reader program would be executed with the path of the PDF file as an argument,
If your needs are to write a browser e...
Initialize class fields in constructor or at declaration?
...declaration (null, false, 0, 0.0…).
Prefer initialization in declaration if you don't have a constructor parameter that changes the value of the field.
If the value of the field changes because of a constructor parameter put the initialization in the constructors.
Be consistent in your practice (t...
LINQ To Entities does not recognize the method Last. Really?
...First(), which is what you did.
EDIT:
Other providers will possibly have different implementations of SELECT TOP 1, on Oracle it would probably be something more like WHERE ROWNUM = 1
EDIT:
Another less efficient alternative - I DO NOT recommend this! - is to call .ToList() on your data before .L...