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How to delete all data from solr and hbase
...data in HBase do something like this.
public static void deleteHBaseTable(String tableName, Configuration conf) {
HBaseAdmin admin = null;
try {
admin = new HBaseAdmin(conf);
admin.disableTable(tableName);
admin.deleteTable(tableName);
} catch (MasterNotRunni...
When and why are database joins expensive?
...t of multi-column joins and radically reducing the cost of joins involving string comparisons. Not only will vastly more fit in cache, there's a lot less disk reading to do.
Moreover, a good optimiser will choose the most restrictive condition and apply it before it performs a join, very effective...
count members with jsonpath?
...Test
public void givenJson_whenGetLengthWithJsonPath_thenGetLength() {
String jsonString = "{'username':'jhon.user','email':'jhon@company.com','age':'28'}";
int length = JsonPath
.parse(jsonString)
.read("$.length()");
assertThat(length).isEqualTo(3);
}
Or simply pars...
How to handle multiple cookies with the same name?
...nger paths are listed before cookies with shorter paths.
NOTE: Not all user agents sort the cookie-list in this order, but this
order reflects common practice when this document was written, and,
historically, there have been servers that (erroneously) depended on
this order.
There i...
Deserialize json object into dynamic object using Json.net
...n.NET allows us to do this:
dynamic d = JObject.Parse("{number:1000, str:'string', array: [1,2,3,4,5,6]}");
Console.WriteLine(d.number);
Console.WriteLine(d.str);
Console.WriteLine(d.array.Count);
Output:
1000
string
6
Documentation here: LINQ to JSON with Json.NET
See also JObject.Parse ...
How to get a json string from url?
...Use the WebClient class in System.Net:
var json = new WebClient().DownloadString("url");
Keep in mind that WebClient is IDisposable, so you would probably add a using statement to this in production code. This would look like:
using (WebClient wc = new WebClient())
{
var json = wc.DownloadSt...
How can I set up an editor to work with Git on Windows?
...single-quotes so you must use double quotes "to specify the space embedded string argument".
Cygwin (which I believe is the underlying platform for Git's Bash) on the other hand likes both ' and "; you can specify a CMD-like paths, using / instead of \, so long as the string is quoted i.e. in this ...
Carriage Return/Line Feed in .Net Resource File (App_GlobalResources)
...In the resource editor (where you can specify the name of the resource and string content) put the string content separated by Shift+Enter.
Lets say you want to type in
hello
world
Type "hello" followed by Shift+Enter and "world".
If you look at the Resources.Resx file (which is an xml fil...
Why is typeof null “object”?
...hat the five types of primitives are: undefined, null, boolean, number and string.
8 Answers
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What does “exec sp_reset_connection” mean in Sql Server Profiler? [duplicate]
...y
connection pooling matches connections
based on the exact connection string
Application roles entered using sp_setapprole, since application roles could not be reverted at all prior to SQL Server 2005. Starting in SQL Server 2005, app roles can be reverted, but only with additional informati...