大约有 13,700 项符合查询结果（耗时：0.0409秒） [XML]
Why do we need the “finally” clause in Python?
...
It makes a difference if you return early:
try:
run_code1()
except TypeError:
run_code2()
return None # The finally block is run before the method returns
finally:
other_code()
Compare to this:
try:
run_code1()
except TypeError:
run_code2()
return...
Templated check for the existence of a class member function?
...truct Generic {};
// SFINAE test
template <typename T>
class has_helloworld
{
typedef char one;
struct two { char x[2]; };
template <typename C> static one test( decltype(&C::helloworld) ) ;
template <typename C> static two test(...);
public:
enum...
How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
...
Provide the :name option to add_index, e.g.:
add_index :studies,
["user_id", "university_id", "subject_name_id", "subject_type_id"],
:unique => true,
:name => 'my_index'
If using the :index option on references in a create_table block, it t...
node.js: read a text file into an array. (Each line an item in the array.)
...ade by Windows, I had to split \r\n but that broke Macs; so a more robust; _array = string.replace(/\r\n/g,'\n').split('\n'); worked for both
– Will Hancock
May 5 '15 at 15:37
6
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Overcoming “Display forbidden by X-Frame-Options”
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With PHP it's probably better to use the new header_remove function, provided you have it available (>=5.3.0).
– a cat
Feb 9 '13 at 0:19
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Most efficient way to reverse a numpy array
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When you create reversed_arr you are creating a view into the original array. You can then change the original array, and the view will update to reflect the changes.
Are you re-creating the view more often than you need to? You should be able to...
Using Java to find substring of a bigger string using Regular Expression
... specifically *?. You're going to probably want the following:
Pattern MY_PATTERN = Pattern.compile("\\[(.*?)\\]");
This will give you a pattern that will match your string and put the text within the square brackets in the first group. Have a look at the Pattern API Documentation for more info...
Secure random token in Node.js
...oding in node is not url-safe, it includes / and + instead of - and _ . Therefore, the easiest way to generate such token I've found is
...
sed or awk: delete n lines following a pattern
...
This might work for you:
cat <<! >pattern_number.txt
> 5 3
> 10 1
> 15 5
> !
sed 's|\(\S*\) \(\S*\)|/\1/,+\2{//!d}|' pattern_number.txt |
sed -f - <(seq 21)
1
2
3
4
5
9
10
12
13
14
15
21
...
How would you count occurrences of a string (actually a char) within a string?
... 134| 1853| 95| 1146| 671|
LukeH_1 | 346| 4490| N/A| N/A| N/A|
LukeH_2 | 152| 1569| 197| 2425| 2171|
Bobwienholt | 230| 3269| N/A| N/A| ...