大约有 46,000 项符合查询结果（耗时：0.0477秒） [XML]
Is Python strongly typed?
... of a value doesn't change in unexpected ways. A string containing only digits doesn't magically become a number, as may happen in Perl. Every change of type requires an explicit conversion.
Dynamic typing means that runtime objects (values) have a type, as opposed to static typing where variables h...
Pass in an array of Deferreds to $.when()
...e the ... spread operator instead:
$.when(...my_array).then( ___ );
In either case, since it's unlikely that you'll known in advance how many formal parameters the .then handler will require, that handler would need to process the arguments array in order to retrieve the result of each promise.
...
MySQL get the date n days ago as a timestamp
...
DATE_SUB will do part of it depending on what you want
mysql> SELECT DATE_SUB(NOW(), INTERVAL 30 day);
2009-06-07 21:55:09
mysql> SELECT TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 day));
2009-06-07 21:55:09
mysql> SELECT UNIX_TIMESTAMP(DATE_SU...
Calling shell functions with xargs
...
Exporting the function should do it (untested):
export -f echo_var
seq -f "n%04g" 1 100 | xargs -n 1 -P 10 -I {} bash -c 'echo_var "$@"' _ {}
You can use the builtin printf instead of the external seq:
printf "n%04g\n" {1..100} | xargs -n 1 -P 10 -I {} b...
LINQ order by null column where order is ascending and nulls should be last
...herwise each orderby is a separate operation on the collection re-ordering it each time.
This should order the ones with a value first, "then" the order of the value.
share
|
improve this answer
...
Check list of words in another string [duplicate]
... all words from that list are inside the string, just replace any() above with all()
– Nas Banov
Jul 17 '10 at 23:23
17
...
How to update a record using sequelize for node?
I'm creating a RESTful API with NodeJS, express, express-resource, and Sequelize that is used to manage datasets stored in a MySQL database.
...
Unresolved external symbol in object files
...his error often means that some function has a declaration, but not a definition.
Example:
// A.hpp
class A
{
public:
void myFunc(); // Function declaration
};
// A.cpp
// Function definition
void A::myFunc()
{
// do stuff
}
In your case, the definition cannot be found. The issue could be ...
Python, remove all non-alphabet chars from string
I am writing a python MapReduce word count program. Problem is that there are many non-alphabet chars strewn about in the data, I have found this post Stripping everything but alphanumeric chars from a string in Python which shows a nice solution using regex, but I am not sure how to implement it
...
Repeat a task with a time delay?
I have a variable in my code say it is "status".
12 Answers
12
...