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ComponentGroup 组件组扩展：监控内容变化和批量启用禁用组件 · App Inventor 2 中文网
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How do I detect if Python is running as a 64-bit application? [duplicate]
...2.6, 2.7, Python 3.x.
$ arch -i386 /usr/local/bin/python2.7
Python 2.7.9 (v2.7.9:648dcafa7e5f, Dec 10 2014, 10:10:46)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import platform, sys
>>> platform....
how does multiplication differ for NumPy Matrix vs Array classes?
...
The main reason to avoid using the matrix class is that a) it's inherently 2-dimensional, and b) there's additional overhead compared to a "normal" numpy array. If all you're doing is linear algebra, then by all means, feel free t...
How to determine if a point is in a 2D triangle? [closed]
....x) * (p1.y - p3.y);
}
bool PointInTriangle (fPoint pt, fPoint v1, fPoint v2, fPoint v3)
{
float d1, d2, d3;
bool has_neg, has_pos;
d1 = sign(pt, v1, v2);
d2 = sign(pt, v2, v3);
d3 = sign(pt, v3, v1);
has_neg = (d1 < 0) || (d2 < 0) || (d3 < 0);
has_pos = (d1 &...
ios Upload Image and Text using HTTP POST
...ields.
NSString *BoundaryConstant = [NSString stringWithString:@"----------V2ymHFg03ehbqgZCaKO6jy"];
// string constant for the post parameter 'file'. My server uses this name: `file`. Your's may differ
NSString* FileParamConstant = [NSString stringWithString:@"file"];
// the server url to which ...
Breadth First Vs Depth First
...t[0].wasVisited = true;
displayVertex(0);
queue.insert(0);
int v2;
while (!queue.isEmpty()) {
int v1 = queue.remove();
// Until it has no unvisited neighbors, get one
while ((v2 = getAdjUnvisitedVertex(v1)) != -1) {
vertexList[v2].wasVisited = true...
MongoDB: How to update multiple documents with a single command?
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I'm not sure about when this change happened but, Mongodb v2.2.2 does this a bit differently. db.collection.update( <query>, <update>, <options> ) where options is a set of key value pairs. See documentation: docs.mongodb.org/manual/applications/update
...
Duplicate keys in .NET dictionaries?
...var list = new ListWithDuplicates();
list.Add("k1", "v1");
list.Add("k1", "v2");
list.Add("k1", "v3");
foreach(var item in list)
{
string x = string.format("{0}={1}, ", item.Key, item.Value);
}
Outputs k1=v1, k1=v2, k1=v3
...
Use RSA private key to generate public key?
...ended by the PKCS#1 v1.5 as an alternative (second) representation. PKCS#1 v2.0 standard excludes e and d exponents from the alternative representation altogether. PKCS#1 v2.1 and v2.2 propose further changes to the alternative representation, by optionally including more CRT-related components.
To...
Cron job every three days
...
I am not a cron specialist, but how about:
0 */72 * * *
It will run every 72 hours non-interrupted.
https://crontab.guru/#0_/72___
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