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How does push notification technology work on Android?
...into my mind is that the device keep server updated with its current path (IP). When google server needs to send notification, it takes its current path and forward message to that path. Am I right to some extent?
– Khawar Raza
Jul 16 '12 at 17:02
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Better way to check variable for null or empty string?
Since PHP is a dynamic language what's the best way of checking to see if a provided field is empty?
10 Answers
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Use Expect in a Bash script to provide a password to an SSH command
I'm trying to use Expect in a Bash script to provide the SSH password. Providing the password works, but I don't end up in the SSH session as I should. It goes back strait to Bash.
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Get a random item from a JavaScript array [duplicate]
...tion if you want: npmjs.com/package/lodash.sample
– XåpplI'-I0llwlg'I -
Dec 4 '15 at 11:32
4
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Apache and Node.js on the Same Server
...with the ProxyPass directive in the Apache httpd.conf its not too hard to pipe all requests on a particular URL to your Node.JS application.
ProxyPass /node http://localhost:8000
Also, make sure the following lines are NOT commented out so you get the right proxy and submodule to reroute http req...
Google Tag Manager 入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...oogle Tag Manager 产品了，首先他完全免费，其次界面操作，权限管理等，和Google Analytics操作习惯类似，可以很快上手。
账号添加：
首先你需要注册一个新账号，用gmail邮箱即可，然后创建一个Account：
指定默认的Container名...
How can I pipe stderr, and not stdout?
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@JonasDahlbæk: the tweak is primarily an issue of tidiness. In truly arcane situations, it might make the difference between a process detecting and not detecting EOF, but that requires very peculiar circumstances.
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Capitalize words in string [duplicate]
... This doesn't seem to work for nordic characters ä, ö, and å. For example päijät-häme becomes PäIjäT-HäMe
– Markus Meskanen
Dec 15 '16 at 12:18
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How to determine SSL cert expiration date from a PEM encoded certificate?
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Here's my bash command line to list multiple certificates in order of their expiration, most recently expiring first.
for pem in /etc/ssl/certs/*.pem; do
printf '%s: %s\n' \
"$(date --date="$(openssl x509 -enddate -noout -in "$pem"|cut -d= -f 2)" --iso-8...
GitHub Windows client behind proxy
...oxy and firewall. Following various other posts and experimenting with multiple combinations of environment variables and config variables I have found the only way to get cloning and push updates to work is by using the HTTPS_PROXY environment variable, including my full corporate domain user ID an...