大约有 40,000 项符合查询结果（耗时：0.0539秒） [XML]
scp (secure copy) to ec2 instance without password
...om a local server to a remote server
sudo scp -i my-pem-file.pem ./source/test.txt ec2-user@1.2.3.4:~/destination/
copy a file from a remote server to a local machine
sudo scp -i my-pem-file.pem ec2-user@1.2.3.4:~/source/of/remote/test.txt ./where/to/put
So the basically syntax is:-
scp -i my...
How to Sort a List by a property in the object
...
One must first test for null on the as cast. Which is the whole point of as, as (ha, ha) (Order)obj throws an exception when it fails. if(orderToCompare == null) return 1;.
– radarbob
Oct 16 '14 at 14:...
Profiling Django
..., I find it's very easy to use the shell in tandem with Django's fantastic test Client for generating profile logs on-the-fly, especially in production. I've used this technique now on several occasions because it has a light touch — no pesky middleware or third-party Django applications are requi...
What is the most pythonic way to check if an object is a number?
...
Use Number from the numbers module to test isinstance(n, Number) (available since 2.6).
>>> from numbers import Number
... from decimal import Decimal
... from fractions import Fraction
... for n in [2, 2.0, Decimal('2.0'), complex(2, 0), Fraction(2, 1)...
Javascript Shorthand for getElementById
...Of(s.slice(1))>=0)b.push(a[i]);
return b;
}
}
Usage : _(".test") returns all elements with class name test, and _("#blah") returns an element with id blah.
share
|
improve this answ...
What is the difference between the GNU Makefile variable assignments =, ?=, := and +=?
...efile*/
x := foo
y := $(x) bar
x := later
a = foo
b = $(a) bar
a = later
test:
@echo x - $(x)
@echo y - $(y)
@echo a - $(a)
@echo b - $(b)
make test prints:
x - later
y - foo bar
a - later
b - later bar
Check more elaborate explanation here
...
What does the question mark operator mean in Ruby?
... a ternary operator, converting a character to its ASCII integer, usage in test, in RegEx'es, etc.) many of which are covered in the other answers here.
– Karl Wilbur
Sep 11 '15 at 20:36
...
Most efficient way to determine if a Lua table is empty (contains no entries)?
... in the metatable as well) and when assigning nil, decrement the counter.
Testing for empty table would be to test the counter with 0.
Here's a pointer to metatable documentation
I do like your solution though, and I honestly can't assume that my solution is faster overall.
...
Multi-statement Table Valued Function vs Inline Table Valued Function
...mewhat like a VIEW in that it will calculate an execution plan using the latest statistics on the tables in question. A MSTVF is equivalent to stuffing the entire contents of your SELECT statement into a table variable and then joining to that. Thus, the compiler cannot use any table statistics on t...
How can I include raw JSON in an object using Jackson?
...a Java object when the object is (de)serialized using Jackson. In order to test this functionality, I wrote the following test:
...