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How to check if a process id (PID) exists
... process is not owned by the running user, you may not have permissions to call kill -0. Better to use ps -p $PID > /dev/null 2>&1, which allows you to see process status, even if you do not have permissions to send a signal.
– mckoss
Apr 1 '12 at 16...
Programmatically Determine a Duration of a Locked Workstation?
... do it. According to this Microsoft article, "There is no function you can call to determine whether the workstation is locked." It must be monitored using the SessionSwitchEventHandler.
– JonathanDavidArndt
Mar 12 at 2:26
...
Rails - How to use a Helper Inside a Controller
...> (Rails 4 & 3) (WARNING: this instantiates a new view instance per call)
@template.<helper> (Rails 2)
include helper in a singleton class and then singleton.helper
include the helper in the controller (WARNING: will make all helper methods into controller actions)
...
How to update SQLAlchemy row entry?
...se, I suggest you post a new question showing what you are stuck on specifically.
– MarredCheese
May 20 at 17:00
Thank...
How can I dynamically create a selector at runtime with Objective-C?
...@selector(MyMethodName:) but what I want to do is create a selector dynamically from an NSString . Is this even possible?
...
How to remove “disabled” attribute using jQuery?
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Why use prop() when you could use attr()/removeAttr() to do this?
Basically, prop() should be used when getting or setting properties (such as autoplay, checked, disabled and required amongst others).
By using removeAttr(), you are completely removing the disabled attribute itself - while pro...
Securely storing environment variables in GAE with app.yaml
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@obl - An App Engine app is automatically authenticated to its own datastore, no authentication details needed. It's pretty neat :-)
– Martin Omander
Jul 9 '19 at 14:31
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How do I implement basic “Long Polling”?
...
It's simpler than I initially thought.. Basically you have a page that does nothing, until the data you want to send is available (say, a new message arrives).
Here is a really basic example, which sends a simple string after 2-10 seconds. 1 in 3 chance of returning a...
How do I measure the execution time of JavaScript code with callbacks?
...method that is designed for this. Check out process.hrtime(); .
So, I basically put this at the top of my app.
var start = process.hrtime();
var elapsed_time = function(note){
var precision = 3; // 3 decimal places
var elapsed = process.hrtime(start)[1] / 1000000; // divide by a million t...
cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
...On-chip APIC Hardware
10 Reserved
11 SEP Fast System Call
12 MTRR Memory Type Range Registers
13 PGE Page Global Enable
14 MCA Machine-Check Architecture
15 CMOV Conditional Move Instruction
16 PAT Page Attribute Table
17 PSE-36...