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How do I find the authoritative name-server for a domain name?
...me, and this is how you accomplish it using the universally available nslookup command line tool:
command line> nslookup
> set querytype=soa
> stackoverflow.com
Server: 217.30.180.230
Address: 217.30.180.230#53
Non-authoritative answer:
stackoverflow.com
origin = ns...
Why am I getting 'Assembly '*.dll' must be strong signed in order to be marked as a prerequisite.'?
...
My guess is that you're not working with strongly named assemblies. I've had this error when two projects reference slightly different versions of the same assembly and a more dependent project references these projects. The resolution in my case was to re...
How to default to other directory instead of home directory
...en it, I am in the home directory. I have to change the directory to my workspace, like:
16 Answers
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What's the difference between an element and a node in XML?
I'm working in Java with XML and I'm wondering; what's the difference between an element and a node?
13 Answers
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PHP/MySQL insert row then get 'id'
...
$link = mysqli_connect('127.0.0.1', 'my_user', 'my_pass', 'my_db');
mysqli_query($link, "INSERT INTO mytable (1, 2, 3, 'blah')");
$id = mysqli_insert_id($link);
See mysqli_insert_id().
Whatever you do, don't insert and then do...
Replace all elements of Python NumPy Array that are greater than some value
I have a 2D NumPy array and would like to replace all values in it greater than or equal to a threshold T with 255.0. To my knowledge, the most fundamental way would be:
...
How many constructor arguments is too many?
...answered Sep 2 '08 at 19:08
toolkittoolkit
46.6k1717 gold badges101101 silver badges132132 bronze badges
...
Naming returned columns in Pandas aggregate function? [duplicate]
...ta.groupby(...).agg(...)
df.columns = df.columns.droplevel(0)
If you'd like to keep the outermost level, you can use the ravel() function on the multi-level column to form new labels:
df.columns = ["_".join(x) for x in df.columns.ravel()]
For example:
import pandas as pd
import pandas.rpy.co...
How do I download a binary file over HTTP?
... file.write(resp.body)
end
end
puts "Done."
Edit: Changed. Thank You.
Edit2: The solution which saves part of a file while downloading:
# instead of http.get
f = open('sample.flv')
begin
http.request_get('/sample.flv') do |resp|
resp.read_body do |segment|
f.wri...
~x + ~y == ~(x + y) is always false?
...
Assume for the sake of contradiction that there exists some x and some y (mod 2n) such that
~(x+y) == ~x + ~y
By two's complement*, we know that,
-x == ~x + 1
<==> -1 == ~x + x
Noting this result, we have,
~(x+y) == ...