大约有 42,000 项符合查询结果（耗时：0.0638秒） [XML]
Convert a list of characters into a string
...
This works in many popular languages like JavaScript and Ruby, why not in Python?
>>> ['a', 'b', 'c'].join('')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'list' object has no attribute 'join'
Strange enough,...
Select rows which are not present in other table
...
There are basically 4 techniques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM login_log l
WHERE NOT EXISTS (
SELECT -- SELECT list mostly irrelevant; can just be empty in Postgres
FROM ip_location
WHERE ip = l.ip
...
How to dynamically insert a tag via jQuery after page load?
...ems getting this to work. I first tried setting my script tags as strings and then using jquery replaceWith() to add them to the document after page load:
...
How to get a Color from hexadecimal Color String
...olor class method:
public static int parseColor (String colorString)
From Android documentation:
Supported formats are: #RRGGBB #AARRGGBB 'red', 'blue', 'green', 'black', 'white', 'gray', 'cyan', 'magenta', 'yellow', 'lightgray', 'darkgray'
AndroidX: String.toColorInt()
...
Matplotlib scatter plot with different text at each data point
I am trying to make a scatter plot and annotate data points with different numbers from a list.
So, for example, I want to plot y vs x and annotate with corresponding numbers from n .
...
C#: Assign same value to multiple variables in single statement
...nce.
Take for example a class that write to the console everytime the get and set accessor are invoked.
static void Main(string[] args)
{
var accessorSource = new AccessorTest(5);
var accessor1 = new AccessorTest();
var accessor2 = new AccessorTest();
accessor1.Value = accessor2.V...
Python Pandas merge only certain columns
...e to only merge some columns? I have a DataFrame df1 with columns x, y, z, and df2 with columns x, a ,b, c, d, e, f, etc.
5...
How can I generate a diff for a single file between two branches in github
... me to do this for all changed files, but that's no good as there are thousands of files in my repo.
5 Answers
...
Values of disabled inputs will not be submitted
...support the disabled attribute: BUTTON, INPUT,
OPTGROUP, OPTION, SELECT, and TEXTAREA.
This attribute is inherited but local declarations override the
inherited value.
How disabled elements are rendered depends on the user agent. For
example, some user agents "gray out" disabled menu...
Can I change the size of UIActivityIndicator?
...
The size is fixed by the style. It's a standardized interface element so the API doesn't like to fiddle with it.
However, you probably could do a scaling transform on it. Not sure how that would affect it visually, however.
Just from a UI design perspective, its...