大约有 42,000 项符合查询结果（耗时：0.0279秒） [XML]
Android add placeholder text to EditText
...er the field is selected (unlike how hint behaves), do this:
In Java:
// Cast Your EditText as a TextView
((TextView) findViewById(R.id.email)).setText("your Text")
In Kotlin:
// Cast your EditText into a TextView
// Like this
(findViewById(R.id.email) as TextView).text = "Your Text"
// Or si...
How to check if there exists a process with a given pid in Python?
...s? I'm getting a pid from a different source other than from os.getpid() and I need to check to see if a process with that pid doesn't exist on the machine.
...
How to discover number of *logical* cores on Mac OS X?
How can you tell, from the command line, how many cores are on the machine when you're running Mac OS X? On Linux, I use:
...
Python, add trailing slash to directory string, os independently
...os.path.join(path, '', '') or os.path.join(path_with_a_trailing_slash, '') and you will still only get one trailing slash.
share
|
improve this answer
|
follow
...
Python module os.chmod(file, 664) does not change the permission to rw-rw-r— but -w--wx----
...zero is important, it's because
permissions are set as an octal integer, and Python automagically
treats any integer with a leading zero as octal. So os.chmod("file",
484) (in decimal) would give the same result.
What you are doing is passing 664 which in octal is 1230
In your case you woul...
Why do we use Base64?
...
Your first mistake is thinking that ASCII encoding and Base64 encoding are interchangeable. They are not. They are used for different purposes.
When you encode text in ASCII, you start with a text string and convert it to a sequence of bytes.
When you encode data in Base64,...
What are the main uses of yield(), and how does it differ from join() and interrupt()?
...ementation, the way that Thread.yield() works has
changed between Java 5 and Java 6.
In Java 5, Thread.yield() calls the Windows API call Sleep(0). This
has the special effect of clearing the current thread's quantum and
putting it to the end of the queue for its priority level. In other
...
Difference between subprocess.Popen and os.system
What is the difference between subprocess.Popen() and os.system() ?
5 Answers
5
...
Most used parts of Boost [closed]
When I discovered boost::lexical_cast I thought to myself "why didn't I know about this sooner!" - I hated having to write code like
...
Simplest way to do a recursive self-join?
...can preserve the tree order:
WITH q AS
(
SELECT m.*, CAST(ROW_NUMBER() OVER (ORDER BY m.PersonId) AS VARCHAR(MAX)) COLLATE Latin1_General_BIN AS bc
FROM mytable m
WHERE ParentID IS NULL
UNION ALL
SELECT m.*, q.bc + '.' + CAST(ROW_NUMBER() ...