大约有 44,000 项符合查询结果（耗时：0.0547秒） [XML]
Show which git tag you are on?
...ler command works perfectly:
git describe --tags
(Or without the --tags if you have checked out an annotated tag. My tag is lightweight, so I need the --tags.)
original answer follows:
git describe --exact-match --tags $(git log -n1 --pretty='%h')
Someone with more git-fu may have a more eleg...
File being used by another process after using File.Create()
I'm trying to detect if a file exists at runtime, if not, create it. However I'm getting this error when I try to write to it:
...
Should I use multiplication or division?
...5 end'
real 0m7.997s
user 0m7.516s
sys 0m0.036s
=> no real difference
LuaJIT:
time luajit -O -e 'for i=1,1e8 do t=12341234234.234 / 2.0 end'
real 0m1.921s
user 0m1.668s
sys 0m0.004s
time luajit -O -e 'for i=1,1e8 do t=12341234234.234 * 0.5 end'
real 0m1.843s
user 0m...
check if variable is dataframe
when my function f is called with a variable I want to check if var is a pandas dataframe:
2 Answers
...
How to remove an item for a OR'd enum?
...ssentially reverses or 'flips' all bits for the given data type. As such, if you use the AND operator (&) with some value (let's call that value 'X') and the complement of one or more set bits (let's call those bits Q and their complement ~Q), the statement X & ~Q clears any bits that were ...
The default for KeyValuePair
...
Try this:
if (getResult.Equals(new KeyValuePair<T,U>()))
or this:
if (getResult.Equals(default(KeyValuePair<T,U>)))
share
|
...
nil detection in Go
... // not nil
or
var config *Config // nil
Then you'll be able to check if
if config == nil {
// then
}
share
|
improve this answer
|
follow
|
...
Given a class, see if instance has method (Ruby)
I know in Ruby that I can use respond_to? to check if an object has a certain method.
12 Answers
...
What is the volatile keyword useful for?
...ome code continues a loop. The loop tests the volatile value and continues if it is true. The condition can be set to false by calling a "stop" method. The loop sees false and terminates when it tests the value after the stop method completes execution.
The book "Java Concurrency in Practice," whic...
How to get the insert ID in JDBC?
...
If it is an auto generated key, then you can use Statement#getGeneratedKeys() for this. You need to call it on the same Statement as the one being used for the INSERT. You first need to create the statement using Statement.RE...