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Is it possible to ping a server from Javascript?
...that.good();};
this.start = new Date().getTime();
this.img.src = "http://" + ip;
this.timer = setTimeout(function() { _that.bad();}, 1500);
}
}
This works on all types of servers that I've tested (web servers, ftp servers, and game servers). It also works with ports. If anyone enco...
网站伪静态Rewrite重写中文路径时乱码 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...解决这个问题下面我们来总结一下我的分析过程。转自：http://www.111cn.net/sys/Windows/55779.htm
一、问题的由来。
URL就是网址，只要上网，就一定会用到。
一般来说，URL只能使用英文字母、阿拉伯数字和某些标点符号，不能使用...
How to install Xcode Command Line Tools
...code. Instead they must be downloaded from the Apple Developer Tools site: https://developer.apple.com/downloads/index.action. This requires signing in with a developer account.
Or via terminal (from the release docs): The Command Line Developer Tools package can be installed on demand using "xcode...
Is it possible to run a single test in MiniTest?
...
No gem required:
ruby -Itest test/lib/test.rb --name /some_test/
Source: http://blog.arvidandersson.se/2012/03/28/minimalicous-testing-in-ruby-1-9
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python: Change the scripts working directory to the script's own directory
... get a shorter version by using sys.path[0].
os.chdir(sys.path[0])
From http://docs.python.org/library/sys.html#sys.path
As initialized upon program startup, the first item of this list,
path[0], is the directory containing the script that was used to
invoke the Python interpreter
...
When should I use ugettext_lazy?
...d and untranslated. See the following example:
import logging
from django.http import HttpResponse
from django.utils.translation import ugettext as _, ugettext_noop as _noop
def view(request):
msg = _noop("An error has occurred")
logging.error(msg)
return HttpResponse(_(msg))
...
Python argparse mutual exclusive group
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There is a python patch (in development) that would allow you to do this.
http://bugs.python.org/issue10984
The idea is to allow overlapping mutually exclusive groups. So usage might look like:
pro [-a xxx | -b yyy] [-a xxx | -c zzz]
Changing the argparse code so you can create two groups like...
Routes with Dash `-` Instead of Underscore `_` in Ruby on Rails
... private APIs is not recommended and may break in future Rails versions.
# https://github.com/rails/rails/blob/4-1-stable/actionpack/lib/action_dispatch/routing/mapper.rb#L1012
#
# config/initializers/adjust-route-paths.rb
module ActionDispatch
module Routing
class Mapper
module Resource...
How to limit the maximum value of a numeric field in a Django model?
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You could also create a custom model field type - see http://docs.djangoproject.com/en/dev/howto/custom-model-fields/#howto-custom-model-fields
In this case, you could 'inherit' from the built-in IntegerField and override its validation logic.
The more I think about this, I re...
Convert SVG to image (JPEG, PNG, etc.) in the browser
...:
Use the canvg JavaScript library to render the SVG image using Canvas: https://github.com/gabelerner/canvg
Capture a data URI encoded as a JPG (or PNG) from the Canvas, according to these instructions: Capture HTML Canvas as gif/jpg/png/pdf?
...