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Allow Google Chrome to use XMLHttpRequest to load a URL from a local file
When trying to do a HTTP request using XMLHttpRequest from a local file, it basically fails due to Access-Control-Allow-Origin violation.
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What should main() return in C and C++?
...tes how the program exited. Normal exit is represented by a 0 return value from main. Abnormal exit is signaled by a non-zero return, but there is no standard for how non-zero codes are interpreted. As noted by others, void main() is prohibited by the C++ standard and should not be used. The valid C...
Start / Stop a Windows Service from a non-Administrator user account
...s particular service. My service runs on a variety of Windows OS, starting from Windows Server 2003 to Windows 7.
7 Answers...
Flask-SQLAlchemy import/context issue
... with the app right away - you can do this instead:
# apps.members.models
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
class Member(db.Model):
# fields here
pass
And then in your application setup you can call init_app:
# apps.application.py
from flask import Flask
from ap...
libpthread.so.0: error adding symbols: DSO missing from command line
...t on the order of modules. Symbols are first requested, and then linked in from a library that has them. So you have to specify modules that use libraries first, and libraries after them. Like this:
gcc x.o y.o z.o -la -lb -lc
Moreover, in case there's a circular dependency, you should specify th...
How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]
...h client has a unique (for their machine) port. Does the server reply back from an available port to the client, and simply state the reply came from 80? How does this work?
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Error 'LINK : fatal error LNK1123: failure during conversion to COFF: file invalid or corrupt' after
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@grundic Sort of. We renamed cvtres.exe from the Win 7 sdk so that link.exe doesn't find it and instead uses the new one from .NET 4.5. The Windows 8 SDK no longer contains the command line tools. You now have to install at least Visual Studio 2012 Express for Desk...
How do I move a redis database from one server to another?
...t instance as my new redis server. If it were MySQL, I would export the DB from the old server and import it into the new server. How should I do this with redis?
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jQuery Data vs Attr?
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If you are passing data to a DOM element from the server, you should set the data on the element:
<a id="foo" data-foo="bar" href="#">foo!</a>
The data can then be accessed using .data() in jQuery:
console.log( $('#foo').data('foo') );
//outputs "bar...
Getting distance between two points based on latitude/longitude
...ither convert the numbers manually to radians, or use the radians function from the math module:
from math import sin, cos, sqrt, atan2, radians
# approximate radius of earth in km
R = 6373.0
lat1 = radians(52.2296756)
lon1 = radians(21.0122287)
lat2 = radians(52.406374)
lon2 = radians(16.9251681...