大约有 1,300 项符合查询结果（耗时：0.0248秒） [XML]
How can I run PowerShell with the .NET 4 runtime?
...ath will be something like (example) C:\Windows\System32\WindowsPowerShell\v1.0\
The filename to put configuration in is: powershell.exe.config if your PowerShell.exe is being executed (create the config file if need be).
If PowerShellISE.Exe is running then you need to create its companion conf...
Check if a Postgres JSON array contains a string
...each rabbit likes two foods and 10% of them like carrots:
d=# -- Postgres 9.3 solution
d=# explain analyze select info->>'name' from rabbits where exists (
d(# select 1 from json_array_elements(info->'food') as food
d(# where food::text = '"carrots"'
d(# );
Execution time: 3084.927 ms
...
How to use Elasticsearch with MongoDB?
...is installed.
sudo apt-get install openjdk-7-jre-headless -y
Stick with v1.1.x for now until the Mongo-River plugin bug gets fixed in v1.2.1.
wget https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.1.1.deb
sudo dpkg -i elasticsearch-1.1.1.deb
curl -L http://github.co...
HTTP GET with request body
...uest.
And the description of the GET method in the HTTP/1.1 spec, section 9.3:
The GET method means retrieve whatever information ([...]) is identified by the Request-URI.
which states that the request-body is not part of the identification of the resource in a GET request, only the request URI.
...
Compare version numbers without using split function
...tring:
static class Program
{
static void Main()
{
string v1 = "1.23.56.1487";
string v2 = "1.24.55.487";
var version1 = new Version(v1);
var version2 = new Version(v2);
var result = version1.CompareTo(version2);
if (result > 0)
...
How to get JSON from URL in JavaScript?
...can use jQuery .getJSON() function:
$.getJSON('http://query.yahooapis.com/v1/public/yql?q=select%20%2a%20from%20yahoo.finance.quotes%20WHERE%20symbol%3D%27WRC%27&format=json&diagnostics=true&env=store://datatables.org/alltableswithkeys&callback', function(data) {
// JSON result ...
Which websocket library to use with Node.js? [closed]
...nt for node.js + client for browsers + (v0 has newest to oldest fallbacks, v1 of Socket.io uses engine.io) + channels - used in stack.io. Client library tries to reconnect upon disconnection.
sockjs
WebSocket server and client for node.js and others + client for browsers + newest to oldest fallbacks...
Dynamically select data frame columns using $ and a character value
...ce ( , + , ^ etc) is a function, that takes arguments and is evaluated. df$V1 could be rewritten as
`$`(df , V1)
or indeed
`$`(df , "V1")
But...
`$`(df , paste0("V1") )
...for instance will never work, nor will anything else that must first be evaluated in the second argument. You may only ...
Can someone give an example of cosine similarity, in a very simple, graphical way?
... = [counter2[k] for k in all_items]
return vector1, vector2
def cosim(v1, v2):
dot_product = sum(n1 * n2 for n1, n2 in zip(v1, v2) )
magnitude1 = math.sqrt(sum(n ** 2 for n in v1))
magnitude2 = math.sqrt(sum(n ** 2 for n in v2))
return dot_product / (magnitude1 * magnitude2)
l...
Query for array elements inside JSON type
I'm trying to test out the json type in PostgreSQL 9.3.
I have a json column called data in a table called reports . The JSON looks something like this:
...