大约有 40,000 项符合查询结果（耗时：0.0590秒） [XML]
Python division
...-100 and was having problems only to notice that even with no variables at all, this does not evaluate the way I would expect it to:
...
django change default runserver port
...
You can't run the development server programmatically, so a custom command won't work unless it calls the shell using something like call. If this solution works for you please make sure to mark it as solved.
– Pablo Albornoz
May 13 '1...
How do I get Flask to run on port 80?
...roxy HTTP traffic through apache2 to Flask.
This way, apache2 can handle all your static files (which it's very good at - much better than the debug server built into Flask) and act as a reverse proxy for your dynamic content, passing those requests to Flask.
Here's a link to the official documen...
How do I paste multi-line bash codes into terminal and run it all at once?
... simply start with a ( and end with a ) and Enter, like in the following example:
If I had the following blob
function hello {
echo Hello!
}
hello
You can paste and verify in a terminal using bash by:
Starting with (
Pasting your text, and pressing Enter (to make it pretty)... or not
Endi...
Are duplicate keys allowed in the definition of binary search trees?
...cluded. For example, the example algorithms in the MIT Algorithms book usually present examples without duplicates. It is fairly trivial to implement duplicates (either as a list at the node, or in one particular direction.)
Most (that I've seen) specify left children as <= and right children ...
Update MongoDB field using value of another field
...
The best way to do this is in version 4.2+ which allows using of aggregation pipeline in the update document and the updateOne, updateMany or update collection method. Note that the latter has been deprecated in most if not all languages drivers.
MongoDB 4.2+
Version 4.2 ...
Install .ipa to iPad with or without iTunes
...ght
Install from iTunes - Create .ipa as ad-hoc and normal sync with ipad & itunes.
Or best way you can create a URL for install while creating ipa select as enterprise and create index file with plist. This will work with individual developer account too.
Diawi
...
How to check if array is empty or does not exist? [duplicate]
...t attempt to process array
}
Or, more frequently, its inverse:
if (array && array.length) {
// array and array.length are truthy
// ⇒ probably OK to process array
}
With the introduction of the optional chaining operator (Elvis operator) in ECMAScript 2020, this can be shortened ...
Opacity of div's background without affecting contained element in IE 8?
...
it's simple only you have do is to give
background: rgba(0,0,0,0.3)
& for IE use this filter
background: transparent;
zoom: 1;
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#4C000000,endColorstr=#4C000000); /* IE 6 & 7 */
-ms-filter: "progid:DXImageTransform.Mic...
Empty set literal?
...
Actually, set literals have been backported to Python 2.7, so they are not only available strictly in Python 3.
– Jim Brissom
May 25 '11 at 20:56
...