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When should null values of Boolean be used?
...n column in a database, for example). The null value might mean "we don't know if it's true or false" in this context.
each time a method needs an Object as argument, and you need to pass a boolean value. For example, when using reflection or methods like MessageFormat.format().
...
How to disable word-wrap in Xcode 4 editor?
...add on -- even after reading that, I had trouble finding the option. I see now that Editing and Indentation are at the top of the box, but they are only written in clickable text (at least in Xcode 5)... I was expecting more of a conventional tab UI and had skipped right over them the first couple o...
Nginx no-www to www and www to no-www
...r_name google.com;
index index.php index.html;
####
# now pull the site from one directory #
root /var/www/www.google.com/web;
# done #
location = /favicon.ico {
log_not_found off;
access_log off;
}
}
...
namespaces for enum types - best practices
...g code, I use a struct, as you presumably want the contents to be public.
If you're doing any of these practices, you are ahead of the curve and probably don't need to scrutinize this further.
Newer, C++11 advice:
If you are using C++11 or later, enum class will implicitly scope the enum values w...
What is the difference between Scala's case class and class?
...
@Mitch: True, my bad. Fixed now.
– sepp2k
Feb 22 '10 at 18:56
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In log4j, does checking isDebugEnabled before logging improve performance?
...re up-to-date logging framework where the log statements take a format specification and a list of arguments to be substituted by the logger—but "lazily," only if the logger is enabled. This is the approach taken by slf4j.
See my answer to a related question for more information, and an example o...
Copy a file in a sane, safe and efficient way
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@Peter This should now probably be the accepted answer given that C++17 is available.
– Martin York
Jan 30 at 15:02
add...
Why would iterating over a List be faster than indexing through it?
... item2 -> print item2 etc.
all in a single traversal, which is O(N).
Now, going to the other implementation of List which is ArrayList, that one is backed by a simple array. In that case both of the above traversals are equivalent, since an array is contiguous so it allows random jumps to arbi...
How do you UrlEncode without using System.Web?
...ertain characters, for me it was a number / pound '#' sign in the string.
If that is an issue for you, try:
System.Uri.EscapeDataString() //Works excellent with individual values
Here is a SO question answer that explains the difference:
What's the difference between EscapeUriString and EscapeD...
Using boolean values in C
...PT_OFF false
void foo(bool option) { ... }
In either case, the call site now looks like
foo(OPT_ON);
foo(OPT_OFF);
which the reader has at least a chance of understanding without dredging up the definition of foo.
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