大约有 6,886 项符合查询结果（耗时：0.0198秒） [XML]
How does python numpy.where() work?
...f True/False values, not a single value.
Furthermore, numpy arrays can be indexed by boolean arrays. E.g. x[x>5] yields [6 7 8], in this case.
Honestly, it's fairly rare that you actually need numpy.where but it just returns the indicies where a boolean array is True. Usually you can do what y...
When are C++ macros beneficial? [closed]
...ode fragments. Thus you can define a foreach macro:
#define foreach(list, index) for(index = 0; index < list.size(); index++)
And use it as thus:
foreach(cookies, i)
printf("Cookie: %s", cookies[i]);
Since C++11, this is superseded by the range-based for loop.
...
Multiple types were found that match the controller named 'Home'
... "{controller}/{action}/{id}",
new { controller = "Home", action = "Index", id = UrlParameter.Optional },
new[] { "AppName.Controllers" }
);
and in your ~/Areas/Admin/AdminAreaRegistration.cs:
context.MapRoute(
"Admin_default",
"Admin/{controller}/{action}/{id}",
new { acti...
How do I represent a hextile/hex grid in memory?
...t represent hexes. Each of these hex objects also has 6 "pointers" (or an index to another array) pointing to another array of "sides". Same thing for "vertices". Of course the vertices would have 3 pointers to the adjoining hexes, and the sides would have 2.
So, a hex may be something like:
X, ...
mongodb find by multiple array items
...nother way to do this in mangodb support page docs.mongodb.org/manual/core/indexes/#indexes-on-sub-documents and docs.mongodb.org/manual/core/indexes/#multikey-indexes
– Vivek Bajpai
Apr 1 '13 at 12:49
...
Node.js get file extension
...t the extension of a file name.
var path = require('path')
path.extname('index.html')
// returns
'.html'
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How do I query using fields inside the new PostgreSQL JSON datatype?
...rds in JSON datatype
For bigger tables you may want to add an expression index to increase performance:
Index for finding an element in a JSON array
Postgres 9.4
Adds jsonb (b for "binary", values are stored as native Postgres types) and yet more functionality for both types. In addition to e...
How to remove multiple deleted files in Git repository
...@kelin: from git docs (git-scm.com/docs/git-add): "-u --update Update the index just where it already has an entry matching <pathspec>. This removes as well as modifies index entries to match the working tree, but adds no new files. If no <pathspec> is given when -u option is used, all...
Creating a Radial Menu in CSS
...
text-shadow: 0 1px 1px #6c6f7e;
cursor: pointer;
}
label {
z-index: 2; // place it above the menu which has z-index: 1
margin: -$d/2; // position correction such that it's right in the middle
width: $d; height: $d;
border-radius: 50%;
box-shadow: 0 0 1px 1px white,
...
AWS MySQL RDS vs AWS DynamoDB [closed]
...ed the flexibility to query the data in a number of different ways (adding indexes as necessary of course), then RDS might be a better solution.
The main benefit for using DynamoDB as a NoSQL store is that you get guaranteed read/write throughput at whatever level you require without having to worr...