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What do 'real', 'user' and 'sys' mean in the output of time(1)?
...o): More detail? Use perf [1], [2]. [1] perf.wiki.kernel.org/index.php/Main_Page [2] brendangregg.com/perf.html
– kaiwan
May 9 '15 at 7:46
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Grep characters before and after match?
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3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}'
23_string_and
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what's the correct way to send a file from REST web service to client?
...I, so you're not locked into Jersey):
@GET
@Produces(MediaType.APPLICATION_OCTET_STREAM)
public Response getFile() {
File file = ... // Initialize this to the File path you want to serve.
return Response.ok(file, MediaType.APPLICATION_OCTET_STREAM)
.header("Content-Disposition", "attachme...
Print string to text file
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text_file = open("Output.txt", "w")
text_file.write("Purchase Amount: %s" % TotalAmount)
text_file.close()
If you use a context manager, the file is closed automatically for you
with open("Output.txt", "w") as text_file:
t...
How to import data from mongodb to pandas?
...odes I'm using:
import pandas as pd
from pymongo import MongoClient
def _connect_mongo(host, port, username, password, db):
""" A util for making a connection to mongo """
if username and password:
mongo_uri = 'mongodb://%s:%s@%s:%s/%s' % (username, password, host, port, db)
...
What can you do in MSIL that you cannot do in C# or VB.NET? [closed]
...etty much all over the place. Examine the IL for this: "let print x = print_any x".
– MichaelGG
Feb 24 '09 at 23:22
1
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Is there a performance difference between i++ and ++i in C++?
... this->data += 1;
return *this;
}
Foo Foo::operator++(int ignored_dummy_value) // called for i++
{
Foo tmp(*this); // variable "tmp" cannot be optimized away by the compiler
++(*this);
return tmp;
}
Since the compiler isn't generating code, but just calling an operator++ ...
Java regex email
...ddresses. The Regexp's are very similar:
public static final Pattern VALID_EMAIL_ADDRESS_REGEX =
Pattern.compile("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}$", Pattern.CASE_INSENSITIVE);
public static boolean validate(String emailStr) {
Matcher matcher = VALID_EMAIL_ADDRESS_REGEX.matche...
Proxies with Python 'Requests' module
...he same) proxie(s) for requests using http, https, and ftp protocols:
http_proxy = "http://10.10.1.10:3128"
https_proxy = "https://10.10.1.11:1080"
ftp_proxy = "ftp://10.10.1.10:3128"
proxyDict = {
"http" : http_proxy,
"https" : https_proxy,
"ftp" ...
CSS: background image on background color
...nswered Jan 15 '18 at 17:12
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