大约有 19,000 项符合查询结果（耗时：0.0389秒） [XML]
How do I convert a datetime to date?
...
you could enter this code form for (today date & Names of the Day & hour) :
datetime.datetime.now().strftime('%y-%m-%d %a %H:%M:%S')
'19-09-09 Mon 17:37:56'
and enter this code for (today date simply):
datetime.date.today().strftime('%y-%m-%...
How to add leading zeros for for-loop in shell? [duplicate]
...
Use the following syntax:
$ for i in {01..05}; do echo "$i"; done
01
02
03
04
05
Disclaimer: Leading zeros only work in >=bash-4.
If you want to use printf, nothing prevents you from putting its result in a variable for further use:
$ foo=$(printf "%02d" 5)
$...
How do you return a JSON object from a Java Servlet
How do you return a JSON object form a Java servlet.
13 Answers
13
...
for each loop in Objective-C for accessing NSMutable dictionary
...d value = xyz[key];
// do stuff
}
This works for every class that conforms to the NSFastEnumeration protocol (available on 10.5+ and iOS), though NSDictionary is one of the few collections which lets you enumerate keys instead of values. I suggest you read about fast enumeration in the Collect...
How can I view array structure in JavaScript with alert()?
...ugin as follows:
alert( $.toJSON(myArray) );
This prints the array in a format like
[5, 6, 7, 11]
However, for debugging your Javascript code, I highly recommend Firebug It actually comes with a Javascript console, so you can type out Javascript code for any page and see the results. Things ...
What are the “standard unambiguous date” formats for string-to-date conversion in R?
...n-'NA' element,
and give an error if neither works.
as.Date("01 Jan 2000") yields an error because the format isn't one of the two listed above. as.Date("01/01/2000") yields an incorrect answer because the date isn't in one of the two formats listed above.
I take "standard unambiguo...
Append values to a set in Python
...t;>> my_set = my_set | {2}
>>> my_set
{1, 2}
Or a shorter form using |=:
>>> my_set = {1}
>>> my_set |= {2}
>>> my_set
{1, 2}
Note: In versions prior to Python 2.7, use set([...]) instead of {...}.
...
Developing C# on Linux
...# applications on Linux (Ubuntu). In particular, I have to develop Windows Forms applications.
6 Answers
...
How to create a bash script to check the SSH connection?
...
An even more concise form of #1: ssh -q user@downhost exit | echo $? pipe the connection result into echo
– philn5d
Nov 30 '18 at 21:22
...
How to find the foreach index?
...l management (increments, etc).
A foreach will give you your index in the form of your $key value, so such a hack shouldn't be necessary.
e.g., in a foreach
$index = 0;
foreach($data as $key=>$val) {
// Use $key as an index, or...
// ... manage the index this way..
echo "Index is ...