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How to save/restore serializable object to/from file?
... XML or Json serialization. Here are the functions to do it in the various formats. See my blog post for more details.
Binary
/// <summary>
/// Writes the given object instance to a binary file.
/// <para>Object type (and all child types) must be decorated with the [Serializable] attri...
SQL Server insert if not exists best practice
... the qquestion on SO. But the core of my thought is: How well will this perform against rebuilding the names table from scratch once a week or so? (remember this only takes a few seconds)
– Didier Levy
Mar 14 '11 at 12:35
...
Is it possible to make relative link to image in a markdown file in a gist?
...'t just use the first URL and trust it to always work.
Currently neither form returns a redirect, nor serves a rel=canonical link. I wouldn't bet on Github to never change this!
All internal gist links (e.g. from user's page https://gist.github.com/cben/) omit the trailing slash :-(
Gists in Goog...
python max function using 'key' and lambda expression
...Example 1:
A simple example, suppose you have a list of numbers in string form, but you want to compare those items by their integer value.
>>> lis = ['1', '100', '111', '2']
Here max compares the items using their original values (strings are compared lexicographically so you'd get '2'...
MySQL vs MongoDB 1000 reads
...corporate it into their codebase.
People are seeing real world MongoDB performance largely because MongoDB allows you to query in a different manner that is more sensible to your workload.
For example, consider a design that persisted a lot of information about a complicated entity in a normalised...
What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
...bar. However, if you have a lot of quotes in your string these alternative forms can get hard to read (and therefore hard to maintain). This page provides a good introduction to quoting in Bash.
Arrays ($var vs. $var[@] vs. ${var[@]})
Now for your array. According to the bash manual:
Referenci...
Explaining Python's '__enter__' and '__exit__'
...ock, addrs):
>>> logging.basicConfig(level=logging.DEBUG, format='%(asctime)s \
>>> : %(levelname)s --> %(message)s')
>>> logging.info('Initiating My connection')
>>> self.sock = sock
>>> self.addrs = addrs
>&...
MySQL ON vs USING?
... +1 Nice answer on the syntactical difference. I'm curious about performance differences, if any. I imagine USING interprets to ON.
– Jason McCreary
Jul 6 '12 at 17:36
...
Difference between DTO, VO, POJO, JavaBeans?
... Practically, they are classes written in the Java programming language conforming to a particular convention. They are used to encapsulate many objects into a single object (the bean), so that they can be passed around as a single bean object instead of as multiple individual objects. A JavaBean is...
How does `is_base_of` work?
...ce because whether we can convert from a D* to a B* isn't dependent on the form of inheritance according to 4.10/3
If they are not related
Now let's assume they are not related by inheritance. Thus for the first function we have the following candidates
D* (Host<B, D>&)
And for the s...