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C++ convert hex string to signed integer
...dard, there are a few new utility functions which you can make use of! specifically, there is a family of "string to number" functions (http://en.cppreference.com/w/cpp/string/basic_string/stol and http://en.cppreference.com/w/cpp/string/basic_string/stoul). These are essentially thin wrappers aroun...
git-upload-pack: command not found, when cloning remote Git repo
...ATH
(That works in Bash, Zsh, and tcsh, and probably other shells too.)
If the path it gives back doesn't include the directory that has git-upload-pack, you need to fix it by setting it in .bashrc (for Bash), .zshenv (for Zsh), .cshrc (for tcsh) or equivalent for your shell.
You will need to ma...
Generate random integers between 0 and 9
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Try this:
from random import randrange, uniform
# randrange gives you an integral value
irand = randrange(0, 10)
# uniform gives you a floating-point value
frand = uniform(0, 10)
share
...
What is a “feature flag”?
...was that it's handy to have the control to reduce the feature-set somewhat if you need to, say, reduce db queries if the load is too high.
There are heaps of other reasons you would want to use this though - one of the main being enabling Continuous Delivery: pushing things into production/live ye...
CommandError: You must set settings.ALLOWED_HOSTS if DEBUG is False
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Try
ALLOWED_HOSTS = ['*']
Less secure if you're not firewalled off or on a public LAN, but it's what I use and it works.
EDIT: Interestingly enough I've been needing to add this to a few of my 1.8 projects even when DEBUG = True. Very unsure why.
EDIT: This is ...
CSS 3 slide-in from left transition
...orms make them easier to offload, but left/top/right/bottom are much more difficult.
Source: Mozilla Developer Network (MDN)
Demo:
var $slider = document.getElementById('slider');
var $toggle = document.getElementById('toggle');
$toggle.addEventListener('click', function() {
var isOpen = ...
Thread context switch Vs. process context switch
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First of all, operating system brings outgoing thread in a kernel mode if it is not already there, because thread switch can be performed only between threads, that runs in kernel mode. Then the scheduler is invoked to make a decision about thread to which will be performed switching. After deci...
How many system resources will be held for keeping 1,000,000 websocket open? [closed]
...e processing and sending/receiving data to/from each of those connections. If the incoming connections are spread out over a long period, and they are mostly idle or infrequently sending small chunks of static data then you could probably get much higher than even 1,000,000 simultaneous connections...
App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
...户端1.MessageReceived(Topic, Payload, Message, RetainFlag, DupFlag) {
if (二进制1.VerifyChecksum(Payload, "SUM8")) {
标签1.Text = join("温度：", 二进制1.BytesToNumber(Payload, 3, 2, true) / 10, " ℃")
}
}
各组件收发二进制的对照与组合用法见二进制数据专...
android.content.res.Resources$NotFoundException: String resource ID #0x0
...));
To
dateTime.setText(String.valueOf(app.getTotalDl()));
There are different versions of setText - one takes a String and one takes an int resource id. If you pass it an integer it will try to look for the corresponding string resource id - which it can't find, which is your error.
I guess a...