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mmap() vs. reading blocks
... way faster. You might write a simple benchmark to prove it to yourself:
char data[0x1000];
std::ifstream in("file.bin");
while (in)
{
in.read(data, 0x1000);
// do something with data
}
versus:
const int file_size=something;
const int page_size=0x1000;
int off=0;
void *data;
int fd = open...
PSQLException: current transaction is aborted, commands ignored until end of transaction block
...t = connection.createStatement();
statement.executeQuery("select * from moobar");
//This SQL is correctly formed, yet it throws the
//'transaction is aborted' SQL Exception, why? Because:
//A. you were in a transaction.
//B. You ran a SQL stateme...
Android gradle: buildtoolsVersion vs compileSdkVersion
...n? I remember that I read somewhere that the latest build tools version is selected automatically. I tried removing buildToolsVersion, but Android Studio is not happy with it.
– Hong
Apr 25 '15 at 1:39
...
AngularJS - how to get an ngRepeat filtered result reference
...
Check this answer:
Selecting and accessing items in ng-repeat
<li ng-repeat="item in ..." ng-click="select_item(item)">
share
|
improv...
Is there a way to create multiline comments in Python?
...
In any case, your text editor should also be able to easily comment-out a selected region (by placing a # in front of each line individually). If not, switch to a text editor that does.
Programming in Python without certain text editing features can be a painful experience. Finding the right edito...
What's the difference between OpenID and OAuth?
... service. However, since OAuth does not support discovery, it requires pre-selecting and hard-coding the providers you decide to use. A user visiting your site cannot use any identifier, only those pre-selected by you. Also, OAuth does not have a concept of identity so using it for login means eithe...
LINQ Ring: Any() vs Contains() for Huge Collections
... result = context.Projects.Where(x => lstBizIds.Contains(x.businessId)).Select(x => x.projectId).ToList();
This will give the query
SELECT Id
FROM Projects
INNER JOIN (VALUES (1), (2), (3), (4), (5)) AS Data(Item) ON Projects.UserId = Data.Item
while Any() on the other hand always iterate t...
What is the difference between svg's x and dx attribute?
...}
</style>
<script>
dataset = d3.range(50,500,50);
svg = d3.select("body").append("svg");
svg.attr('width',500).attr('height', 500);
svg.append("line").attr('x1', 0).attr('x2', 500).attr('y1', 100).attr('y2', 100);
svg.append("line").attr('x1', 0).attr('x2', 500).attr('y1', 200).attr...
How can I post an array of string to ASP.NET MVC Controller without a form?
...C and JQuery, and one of the pages is a list of items in which some can be selected. Then I would like to press a button and send a List (or something equivalent) to my controller containing the ids of the items that were selected, using JQuery's Post function.
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Why doesn't Dictionary have AddRange?
...ined =
dict1.Union(dict2)
.GroupBy(kvp => kvp.Key)
.Select(grp => grp.First())
.ToDictionary(kvp => kvp.Key, kvp => kvp.Value);
The main trick when combining dictionaries is dealing with the duplicate keys. In the code above it's the part .Select(grp => g...