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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 ...
Set selected option of select box
...lue of the value attribute of the select option, not its text. See this JSFiddle, which is a very mildly edited version of Darin's demo, for an example of what I mean.
– Kenny Evitt
Aug 19 '14 at 17:51
...
Redis strings vs Redis hashes to represent JSON: efficiency?
...
Option 1 is not a good idea if concurrent modification of the JSON payload is expected (a classic problem of non-atomic read-modify-write).
– Samveen
Aug 23 '16 at 13:16
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How can I create and style a div using JavaScript?
...
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...
What is the difference between Serializable and Externalizable in Java?
...em. To handle this situation, the java.io.Externalizable interface was provided, which is like java.io.Serializable but with custom-written mechanisms to perform the marshalling and unmarshalling functions (you need to implement readExternal and writeExternal methods on your class). This gives you t...
@RequestParam vs @PathVariable
... the controller method would look like:
@RequestMapping(value="/user/{userId}/invoices", method = RequestMethod.GET)
public List<Invoice> listUsersInvoices(
@PathVariable("userId") int user,
@RequestParam(value = "date", required = false) Date dateOrNull) {
...
}
A...
HTML5 best practices; section/header/aside/article elements
...elements, always ask yourself: “Is all of the content related?”
aside – Used for tangentially related content. Just because some content appears to the left or right of the main content isn’t enough reason to use the aside element. Ask yourself if the content within the aside can be rem...
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 ...
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...
MySQL Data - Best way to implement paging?
...I agree that he should have mentioned that he was copying the docs and provided a link to the original source. Also I'm surprised that the documentation would include examples of using LIMIT without an ORDER BY... that seems like a bad practice to be encouraging. Without an ORDER BY there's no guara...