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How to check if running as root in a bash script
...
The $EUID environment variable holds the current user's UID. Root's UID is 0. Use something like this in your script:
if [ "$EUID" -ne 0 ]
then echo "Please run as root"
exit
fi
Note: If you get 2: [: Illegal number: check if...
Build vs new in Rails 3
...ject from the clients collection, and so it can automatically set the firm_id to some_firm.id, whereas the docs are calling Client.new which has no knowledge of any Firm's id at all, so it needs the firm_id passed to it.
The only difference between some_firm.clients.new and some_firm.clients.build ...
How to analyze a java thread dump?
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The TID is thead id and NID is: Native thread ID. This ID is highly platform dependent. It's the NID in jstack thread dumps. On Windows, it's simply the OS-level thread ID within a process. On Linux and Solaris, it's the PID of ...
How to make a DIV visible and invisible with JavaScript
...t then
[DIV].style.visibility='visible'
OR
[DIV].style.visibility='hidden'
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How can I create and style a div using JavaScript?
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var div = document.createElement("div");
div.style.width = "100px";
div.style.height = "100px";
div.style.background = "red";
div.style.color = "white";
div.innerHTML = "Hello";
document.getElementById("main").appendChild(div);
<body>
<div id="main"></d...
Selecting element by data attribute
...e? For example, select all anchors that has data attribute named customerID which has value of 22 .
11 Answers
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Why can't radio buttons be “readonly”?
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Among the solutions below, this solution provides the cleanest code, and works well with Jquery validator since I do not need to enable/disable fields, or deal with unbinding click events and re-binding them when submitting the form.
– Kristianne N...
prevent property from being serialized in web API
...] to ignore property for serialization:
public class Foo
{
public int Id { get; set; }
public string Name { get; set; }
[JsonIgnore]
public List<Something> Somethings { get; set; }
}
But, this way does not support XML format. So, in case your application has to support XML ...
What is a method that can be used to increment letters?
...ted 2019/05/09)
Since this answer has received so much visibility I've decided to expand it a bit beyond the scope of the original question to potentially help people who are stumbling on this from Google.
I find that what I often want is something that will generate sequential, unique strings in ...
MySQL Creating tables with Foreign Keys giving errno: 150
...ined by mistake. See @andrewdotn's answer below for instructions on how to identify these problem FK's.
Hope this helps.
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