大约有 30,000 项符合查询结果（耗时：0.0441秒） [XML]
Is there a simple, elegant way to define singletons? [duplicate]
...e you fully clean up after logging you must call logging.shutdown(). This means you must import logging into the module which calls shutdown. If it was a singleton pattern it is possible to call shutdown on the instance in any module to which it is passed.
– Matt
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Two sets of parentheses after function call
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It means that the first function ($filter) returns another function and then that returned function is called immediately. For Example:
function add(x){
return function(y){
return x + y;
};
}
var addTwo = add(2);
add...
Parcelable where/when is describeContents() used?
... a constant defined in Parcelable called CONTENTS_FILE_DESCRIPTOR which is meant to be used in describeContents() to create bitmask return value.
Description for CONTENTS_FILE_DESCRIPTOR in the API ref is:
Bit masks for use with describeContents(): each bit represents a kind of object consider...
from list of integers, get number closest to a given value
...the function take_closest to conform with PEP8 naming conventions.
If you mean quick-to-execute as opposed to quick-to-write, min should not be your weapon of choice, except in one very narrow use case. The min solution needs to examine every number in the list and do a calculation for each number....
What is meant by Scala's path-dependent types?
...types. It's something to do with inner-classes but what does this actually mean and why do I care?
1 Answer
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Database Structure for Tree Data Structure
What would be the best way to implement a customizable (meaning, a tree structure with an unknown number of level) tree data structure in a database?
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Why is it bad practice to call System.gc()?
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Not entirely sure what you mean by "needs the garbage collector to run". The conditions applications need to avoid are; allocation failures that can never be satisfied and high GC overhead. Randomly making calls to System.gc() often results in high GC ...
How does HTTP file upload work?
... multipart/form-data, as asked at: What does enctype='multipart/form-data' mean?
I'm going to:
add some more HTML5 references
explain why he is right with a form submit example
HTML5 references
There are three possibilities for enctype:
x-www-urlencoded
multipart/form-data (spec points to RF...
PowerShell and the -contains operator
... As already mentioned in comment above, -Match uses regex. That means that the string parameter is a regex, not a normal string. For example, "hello" -Match "." will return true, because "." is a regex where a '.' will match any character. To check if a string contains a full stop: "hello...
Hidden Features of C++? [closed]
...the end of the answer, you mentioned members of a class interface. do you mean ".. is both its member-functions and the friend non-member functions"?
– wilhelmtell
Oct 3 '08 at 22:31
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