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Why does string::compare return an int?
...once. But sure, someone dealing with a string containing a MPEG encoded as Base64 or some such may well run into that problem...
– Mats Petersson
Mar 11 '13 at 21:36
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Maximum on http header values?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Sockets: Discover port availability using Java
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The try/catch socket based solutions , might not yield accurate results (the socket address is "localhost" and in some cases the port could be "occupied" not by the loopback interface and at least on Windows I've seen this test fails i.e. the pro...
Given the lat/long coordinates, how can we find out the city/country?
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Another option:
Download the cities database from http://download.geonames.org/export/dump/
Add each city as a lat/long -> City mapping to a spatial index such as an R-Tree (some DBs also have the functionality)
Use nearest-neighbour search to find the closest c...
Deprecated warning for Rails 4 has_many with order
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Pass Variables by Reference in Javascript
...ys passed by value.
Arrays and Objects are passed by reference or by value based on these conditions:
if you are setting the value of an object or array it is Pass by Value.
object1 = {prop: "car"};
array1 = [1,2,3];
if you are changing a property value of an object or array then it is Pass by Re...
filters on ng-model in an input
... is that we might have watchers that fire and take (inappropriate) actions based on invalid model.
As I see it, the proper solution here is to plug into the $parsers pipeline and make sure that invalid input doesn't make it into the model. I'm not sure how did you try to approach things or what exa...
How do you do Impersonation in .NET?
...ser access into a single API. It works well in both modern and older code bases, with the same simple API:
var credentials = new UserCredentials(domain, username, password);
Impersonation.RunAsUser(credentials, logonType, () =>
{
// do whatever you want as this user.
});
or
var credenti...
DROP IF EXISTS VS DROP?
... first one will throw an error if the table doesn't exist, or if other database objects depend on it. Most often, the other database objects will be foreign key references, but there may be others, too. (Views, for example.) The second will not throw an error if the table doesn't exist, but it wi...
How are Python's Built In Dictionaries Implemented?
...49)
When adding entries to the table, we start with some slot, i, that is based on the hash of the key. CPython initially uses i = hash(key) & mask (where mask = PyDictMINSIZE - 1, but that's not really important). Just note that the initial slot, i, that is checked depends on the hash of the k...