大约有 40,000 项符合查询结果（耗时：0.0462秒） [XML]
How can I count the number of matches for a regex?
...es, only the next match.
Solution for Java 9+
long matches = matcher.results().count();
Solution for Java 8 and older
You'll have to do the following. (Starting from Java 9, there is a nicer solution)
int count = 0;
while (matcher.find())
count++;
Btw, matcher.groupCount() is something c...
How do I check whether a file exists without exceptions?
...
Wait, so pathlib2 < pathlib? pathlib is for python3, right? I've been using pathlib2 thinking it was superior.
– theX
Jul 2 at 21:26
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Postgres and Indexes on Foreign Keys and Primary Keys
... ( 'c', 'cascade' ),
( 'n', 'set null' ),
( 'd', 'set default' )
),
fk_list AS (
SELECT pg_constraint.oid as fkoid, conrelid, confrelid as parentid,
conname, relname, nspname,
fk_actions_update.action as update_action,
fk_actions_delete.action as delete_ac...
git recover deleted file where no commit was made after the delete
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How do you do this for multiple deleted files? Running git reset HEAD <<filename>> multiple times would be cumbersome, any efficient way to get it done?
– SubSul
May 10 '16 at 6:14
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How can I check if a key exists in a dictionary? [duplicate]
... we could go on and on about this, the fact remains, its still an alternative option for <=2.5.
– ghostdog74
Oct 2 '10 at 14:15
|
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Python's most efficient way to choose longest string in list?
...
To get the smallest or largest item in a list, use the built-in min and
max functions:
lo = min(L)
hi = max(L)
As with sort, you can pass in a "key" argument that is used to map the list items before they are compared:
lo = min(L, key=int)
hi = max(L, key=int)
http://ef...
Correct format specifier to print pointer or address?
...ren't happy with the implementation-defined behaviour of %p, then use C99 <inttypes.h> and uintptr_t instead:
printf("0x%" PRIXPTR "\n", (uintptr_t)your_pointer);
This allows you to fine-tune the representation to suit yourself. I chose to have the hex digits in upper-case so that the numb...
Prevent Android activity dialog from closing on outside touch
... you can prevent the closing. But what is strange though, is that the default behavior of your activity dialog should be not to close itself when you touch outside.
(PS: the code uses WindowManager.LayoutParams)
share
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Laravel Eloquent: How to get only certain columns from joined tables
...e values of a single column, you may use the pluck method
For Laravel <= 5.1
Use the ->lists() method
$roles = DB::table('roles')->lists('title');
This method will return an array of role titles. You may also specify a custom key column for the returned array:
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How to get the IP address of the server on which my C# application is running on?
...
Note that this might fail when a machine has multiple 'InterNetwork' ports (In my case: an ethernet card an a virtual machine port). The current code will give you the last IP on the list.
– Christian Studer
Apr 28 '11 at 9:12
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