大约有 47,000 项符合查询结果（耗时：0.0552秒） [XML]
Link to the issue number on GitHub within a commit message
...
i'm not going to be the person who moves this answer from 666 votes to 667, but this was VERY helpful.
– jakeatwork
Sep 5 '16 at 22:06
...
class
....instance_methods.include? :a #=> true
hi object inherits its #methods from its #singleton_class.instance_methods and then from its #class.instance_methods.
Here we gave hi's singleton class instance method :a. It could have been done with class << hi instead.
hi's #singleton_class has all...
Ansible: Set variable to file content
...p will work with local files, not remote files.
Here's a complete example from the docs:
- hosts: all
vars:
contents: "{{ lookup('file', '/etc/foo.txt') }}"
tasks:
- debug: msg="the value of foo.txt is {{ contents }}"
...
What's the idiomatic syntax for prepending to a short python list?
...eally only efficient for rather short lists, as you ask.
Here's a snippet from the CPython source where this is implemented - and as you can see, we start at the end of the array and move everything down by one for every insertion:
for (i = n; --i >= where; )
items[i+1] = items[i];
If you...
How to solve the “failed to lazily initialize a collection of role” Hibernate exception
...
From my experience, I have the following methods to solved the famous LazyInitializationException:
(1) Use Hibernate.initialize
Hibernate.initialize(topics.getComments());
(2) Use JOIN FETCH
You can use the JOIN FETCH sy...
How to find files that match a wildcard string in Java?
...
Consider DirectoryScanner from Apache Ant:
DirectoryScanner scanner = new DirectoryScanner();
scanner.setIncludes(new String[]{"**/*.java"});
scanner.setBasedir("C:/Temp");
scanner.setCaseSensitive(false);
scanner.scan();
String[] files = scanner.get...
Sorting arrays in NumPy by column
...joa's method by using a stable sort like mergesort and sorting the indices from the least significant to the most significant columns:
a = a[a[:,2].argsort()] # First sort doesn't need to be stable.
a = a[a[:,1].argsort(kind='mergesort')]
a = a[a[:,0].argsort(kind='mergesort')]
This sorts by colu...
Convert string to binary in python
...earray(sample_string,encoding='utf-8')))
if __name__ == '__main__':
from timeit import timeit
sample_string = 'Convert this ascii strong to binary.'
print(
timeit(f'method_a("{sample_string}")',setup='from __main__ import method_a'),
timeit(f'method_b("{sample_string...
git cherry-pick says “…38c74d is a merge but no -m option was given”
...
-m means the parent number.
From the git doc:
Usually you cannot cherry-pick a merge because you do not know which side of the merge should be considered the mainline. This option specifies the parent number (starting from
1) of the ma...
How do I associate a Vagrant project directory with an existing VirtualBox VM?
Somehow my Vagrant project has disassociated itself from its VirtualBox VM, so that when I vagrant up Vagrant will import the base-box and create a new virtual machine.
...