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Difference between Select and ConvertAll in C#
...gt; calls, while ConvertAll will loop through the underlying array without extra calls or range checks.
3) Select will create an extra IEnumerable<T> object.
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How to implement has_many :through relationships with Mongoid and mongodb?
...opriate because your join table is an Appointment class which carries some extra information, not just the association.
How you model this depends to some extent on the queries that you need to run but it seems as though you will need to add the Appointment model and define associations to Patient ...
Relative paths in Python
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os.path.dirname(__file__) can give an empty string, use os.path.dirname(os.path.abspath(__file__)) instead
– Dmitry Trofimov
Mar 10 '15 at 22:03
15
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Cleaner way to do a null check in C#? [duplicate]
... return visitor.IsNull;
}
}
class Program
{
static void Main(string[] args)
{
Person nullPerson = null;
var isNull_0 = nullPerson.IsNull(p => p.contact.address.city);
var isNull_1 = new Person().IsNull(p => p.contact.address.city);
var isNull_2...
ruby on rails f.select options with custom attributes
...
def options_for_select(container, selected = nil)
return container if String === container
container = container.to_a if Hash === container
selected, disabled = extract_selected_and_disabled(selected)
options_for_select = container.inject([]) do |options, element|
html_attrib...
Learning Python from Ruby; Differences and Similarities
...rate using multiple indexes. For example, to find all the palindromes in a string (assuming you have a function p() that returns true for palindromes), all you need is a single list comprehension:
s = 'string-with-palindromes-like-abbalabba'
l = len(s)
[s[x:y] for x in range(l) for y in range(x,l+1...
Javascript: Extend a Function
...tion () {
old_init.apply(this, arguments);
// Do something extra
};
init.prototype = old_prototype;
}) ();
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iPhone Data Usage Tracking/Monitoring
... internet.
#include <net/if.h>
#include <ifaddrs.h>
static NSString *const DataCounterKeyWWANSent = @"WWANSent";
static NSString *const DataCounterKeyWWANReceived = @"WWANReceived";
static NSString *const DataCounterKeyWiFiSent = @"WiFiSent";
static NSString *const DataCounterKeyWiFiRe...
How do I bind a WPF DataGrid to a variable number of columns?
... {
Header = column.Name,
Binding = new Binding(string.Format("[{0}]", index++))
});
}
}
// E.g. myGrid.GenerateColumns(schema);
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Get ID of last inserted document in a mongoDB w/ Java driver
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In MongoTemplate.class has a method
protected <T> void doInsert(String collectionName, T objectToSave, MongoWriter<T> writer) {
assertUpdateableIdIfNotSet(objectToSave);
initializeVersionProperty(objectToSave);
maybeEmitEvent(new BeforeConvertEvent<T>(objectToSa...