大约有 16,000 项符合查询结果（耗时：0.0413秒） [XML]
Returning value from called function in a shell script
...ere's how to do each of those options:
1. Echo strings
lockdir="somedir"
testlock(){
retval=""
if mkdir "$lockdir"
then # Directory did not exist, but it was created successfully
echo >&2 "successfully acquired lock: $lockdir"
retval="true"
else
ec...
How to make a HTTP request using Ruby on Rails?
...afely parameters in the URL? Eg: http ://www.example.com/index.html?param1=test1&param2=test2. Then I need to read from the other website parameters and prepare the responce. But how can I read parameters?
– user502052
Jan 3 '11 at 0:01
...
How can I autoformat/indent C code in vim?
... like.
Here's a demo. Before astyle:
int main(){if(x<2){x=3;}}
float test()
{
if(x<2)
x=3;
}
After astyle (gggqG):
int main()
{
if (x < 2)
{
x = 3;
}
}
float test()
{
if (x < 2)
x = 3;
}
Hope that helps.
...
Does .asSet(…) exist in any API?
... this, the most common reason to construct a Set (or List) by hand is in a test class where you are passing in test values.
– Scott McIntyre
May 20 '16 at 14:17
add a comment
...
How can I maintain fragment state when added to the back stack?
...ash. Version 2 removes _rootView in onDestroyView(), as dell116 suggested. Tested on Android 4.0.3, 4.4.4, 5.1.0.
Version 2
public class FragmentA extends Fragment {
View _rootView;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState...
How do I prompt for Yes/No/Cancel input in a Linux shell script?
...cho Yes
else
echo No
fi
(Thanks to Adam Katz's comment: Replaced the test above with one that is more portable and avoids one fork:)
POSIX, but single key feature
But if you don't want the user to have to hit Return, you could write:
(Edited: As @JonathanLeffler rightly suggest, saving stty...
How to check if an object is a certain type
...lso use the TypeOf operator instead of the GetType method. Note that this tests if your object is compatible with the given type, not that it is the same type. That would look like this:
If TypeOf Obj Is System.Web.UI.WebControls.DropDownList Then
End If
Totally trivial, irrelevant nitpick: T...
Get names of all keys in the collection
...ach(function(doc){Object.keys(doc).forEach(function(key){ if (/YOURREGEXP/.test(key)) {allKeys[key]=1}})});
– Li Chunlin
Mar 27 '17 at 4:22
...
ALTER TABLE to add a composite primary key
...er table parent drop column id;
ERROR 1025 (HY000): Error on rename of
'./test/#sql-a04_b' to './test/parent' (errno: 150).
If you want to drop a primary key that's being referenced by another table, you will have to drop the foreign key in that other table first. You can recreate that foreign k...
What is the “hasClass” function with plain JavaScript?
...Query's implementation is better and more reliable. For example: /\bbig\b/.test('big-text') returns true instead of expected false.
– Stano
Jun 18 '13 at 18:43
...