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How to get error information when HttpWebRequest.GetResponse() fails
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So you could catch a WebException which is what will be thrown if a non 200 status code is returned from the server and read its body:
catch (WebException ex)
{
using (var stream = ex.Response.GetResponseStream())
using (var reader = new StreamReader(stream))
{
Console.WriteL...
Constructor overloading in Java - best practice
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172
While there are no "official guidelines" I follow the principle of KISS and DRY. Make the overlo...
How to create a new file together with missing parent directories?
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answered Jun 22 '10 at 6:32
Jon SkeetJon Skeet
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Using 'return' in a Ruby block
...ntext:
$ irb
irb(main):001:0> def thing(*args, &block)
irb(main):002:1> value = block.call
irb(main):003:1> puts "value=#{value}"
irb(main):004:1> end
=> nil
irb(main):005:0>
irb(main):006:0* thing {
irb(main):007:1* return 6 * 7
irb(main):008:1> }
LocalJumpError: une...
What's a monitor in Java?
... synchronized(someObject) {
// do something (1)
}
}
Thread 2:
public void b()
{
synchronized(someObject) {
// do something else (2)
}
}
This prevents Threads 1 and 2 accessing the monitored (synchronized) section at the same time. One will start, and monitor will p...
How to gracefully handle the SIGKILL signal in Java
...you can use (SIGTERM) kill -15 the shutdown hook will work. (SIGINT) kill -2 DOES cause the program to gracefully exit and run the shutdown hooks.
Registers a new virtual-machine shutdown hook.
The Java virtual machine shuts down in response to two kinds of events:
The program exits...
What are fail-safe & fail-fast Iterators in Java
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edited Mar 22 at 23:10
answered Jun 29 '13 at 7:09
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What is the purpose of setting a key in data.table?
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2 Answers
2
Active
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How to select the row with the maximum value in each group
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Here's a data.table solution:
require(data.table) ## 1.9.2
group <- as.data.table(group)
If you want to keep all the entries corresponding to max values of pt within each group:
group[group[, .I[pt == max(pt)], by=Subject]$V1]
# Subject pt Event
# 1: 1 5 2
# 2: ...
How can I use Guzzle to send a POST request in JSON?
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268
For Guzzle 5, 6 and 7 you do it like this:
use GuzzleHttp\Client;
$client = new Client();
$r...