大约有 35,100 项符合查询结果（耗时：0.0449秒） [XML]
How to find first element of array matching a boolean condition in JavaScript?
I'm wondering if there's a known, built-in/elegant way to find the first element of a JS array matching a given condition. A C# equivalent would be List.Find .
...
Browsing Folders in MSYS
...l, all I see is a '~'. I type 'ls' and the folder is empty. I just want to know how to get to my c drive.
3 Answers
...
form serialize javascript (no framework)
Wondering is there a function in javascript without jquery or any framework that allows me to serialize the form and access the serialized version?
...
Laravel Schema onDelete set null
...e out how to set proper onDelete constraint on a table in Laravel. (I'm working with SqLite)
4 Answers
...
Read and write a String from text file
... dir = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
let fileURL = dir.appendingPathComponent(file)
//writing
do {
try text.write(to: fileURL, atomically: false, encoding: .utf8)
}
catch {/* error handling here */}
//reading
do ...
Remove columns from DataTable in C#
I have a DataSet which I get a DataTable from that I am being passed back from a function call. It has 15-20 columns, however I only want 10 columns of the data.
...
How to redirect 'print' output to a file using python?
...:', filename, file=f) # Python 3.x
However, redirecting stdout also works for me. It is probably fine for a one-off script such as this:
import sys
orig_stdout = sys.stdout
f = open('out.txt', 'w')
sys.stdout = f
for i in range(2):
print 'i = ', i
sys.stdout = orig_stdout
f.close()
Re...
When to catch java.lang.Error?
...r, sometimes you need to catch specific errors.
If you're writing framework-ish code (loading 3rd party classes), it might be wise to catch LinkageError (no class def found, unsatisfied link, incompatible class change).
I've also seen some stupid 3rd-party code throwing subclasses of Error, so yo...
Why does C++ require a user-provided default constructor to default-construct a const object?
...fect (against all versions of the standard) and it was resolved by Core Working Group (CWG) Defect 253. The new wording for the standard states in http://eel.is/c++draft/dcl.init#7
A class type T is const-default-constructible if
default-initialization of T would invoke a user-provided constru...
How to make an AJAX call without jQuery?
How to make an AJAX call using JavaScript, without using jQuery?
23 Answers
23
...