大约有 16,000 项符合查询结果（耗时：0.0173秒） [XML]
Checking oracle sid and database name
...resume SELECT user FROM dual; should give you the current user
and SELECT sys_context('userenv','instance_name') FROM dual; the name of the instance
I believe you can get SID as SELECT sys_context('USERENV', 'SID') FROM DUAL;
...
Convert a character digit to the corresponding integer in C
Is there a way to convert a character to an integer in C?
15 Answers
15
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How to process SIGTERM signal gracefully?
...s-test.py:
#!/usr/bin/python
from time import sleep
import signal
import sys
def sigterm_handler(_signo, _stack_frame):
# Raises SystemExit(0):
sys.exit(0)
if sys.argv[1] == "handle_signal":
signal.signal(signal.SIGTERM, sigterm_handler)
try:
print "Hello"
i = 0
while T...
Bash command to sum a column of numbers [duplicate]
... time paste -sd+ file | bc
1448700364
real 1m36.960s
user 1m24.515s
sys 0m1.772s
$ time awk '{s+=$1}END{print s}' file
1448700364
real 0m45.476s
user 0m40.756s
sys 0m0.287s
share
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Assignment inside lambda expression in Python
...ctic reasons. For example, we will be able to write the following:
import sys
say_hello = lambda: (
message := "Hello world",
sys.stdout.write(message + "\n")
)[-1]
say_hello()
In Python 2, it was possible to perform local assignments as a side effect of list comprehensions.
import sys
s...
When should I use cross apply over inner join?
...ross apply. It might have other uses but I think this is the reason it was introduced. Without it table functions would not be usable in a lot of situations. technet.microsoft.com/en-us/library/ms175156.aspx
– MikeKulls
Aug 12 '11 at 0:38
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Java - Convert integer to string [duplicate]
...eturns a String object representing the specified integer. The argument is converted to signed decimal representation and returned as a string, exactly as if the argument and radix 10 were given as arguments to the toString(int, int) method.
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Convert INT to VARCHAR SQL
...ich returns me a column called "iftype", but its type is int and I need to convert into varchar. When I try to do the select without the convert function I get this error:
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How to convert an ArrayList containing Integers to primitive int array?
I'm trying to convert an ArrayList containing Integer objects to primitive int[] with the following piece of code, but it is throwing compile time error. Is it possible to convert in Java?
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What is the difference between == and Equals() for primitives in C#?
...s).
When you call it with an int and a short, the compiler will implicitly convert the short to int and compare the resulting ints by value.
Other ways to make it work
Primitive types also have their own Equals() method that accepts the same type.
If you write age.Equals(newAge), the compiler will s...