大约有 48,000 项符合查询结果（耗时：0.0419秒） [XML]
Use email address as primary key?
...an't say that a proposed key is not unique based on hypotheticals without knowing the context. e.g. from the phone company's point of view, a telephone number uniquely identifies a customer, by definition. Yes, you can say, "But what if there are two or three people who might answer when you call th...
Converting JSON String to Dictionary Not List
...em 0 in the list, as shown below:
json1_data = json.loads(json1_str)[0]
Now you can access the data stored in datapoints just as you were expecting:
datapoints = json1_data['datapoints']
I have one more question if anyone can bite: I am trying to take the average of the first elements in ...
Algorithm to generate all possible permutations of a list?
Say I have a list of n elements, I know there are n! possible ways to order these elements. What is an algorithm to generate all possible orderings of this list? Example, I have list [a, b, c]. The algorithm would return [[a, b, c], [a, c, b,], [b, a, c], [b, c, a], [c, a, b], [c, b, a]].
...
What does “javascript:void(0)” mean?
I've seen such href s many times, but I don't know what exactly that means.
14 Answers
...
How do I return the response from an asynchronous call?
...ejected.
Important: You can only use await inside an async function. Right now, top-level await isn't yet supported, so you might have to make an async IIFE (Immediately Invoked Function Expression) to start an async context.
You can read more about async and await on MDN.
Here is an example that bu...
Undo git reset --hard with uncommitted files in the staging area
...ache --unreachable $(git for-each-ref --format="%(objectname)") > all
Now the object names of those unreachable commits can be found with:
egrep commit all | cut -d ' ' -f 3
So you can find just the trees and objects that have been added to the index, but not committed at any point, with:
g...
How to saveHTML of DOMDocument without HTML wrapper?
...
All of these answers are now wrong, because as of PHP 5.4 and Libxml 2.6 loadHTML now has a $option parameter which instructs Libxml about how it should parse the content.
Therefore, if we load the HTML with these options
$html->loadHTML($conte...
How can I strip first and last double quotes?
... I'd recommend handling strings that are 2 characters or less. Right now this function can throw an index out of bounds exception for a string of length 0. Additionally, you can strip a quote from a string that is 1 character long. You could add a guard, len(s) >= 2, or something similar.
...
Anonymous recursive PHP functions
...
Mind Blown! Thanks a lot! How did I not know about this till now? The amount of application I have for recursive anonymous functions is huge. Now I can finally loop through nested structures in layouts without having to explicitly define a method and keep all my lay...
What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }
...ion outerFunction() {
function innerFunction() {
// code
}
}
Now you can call outerFunction(), but the visiblity of innerFunction() is limited to the scope of outerFunction(), meaning it is private to outerFunction(). It basically follows the same principle as variables in Javascript:
...