大约有 40,000 项符合查询结果（耗时：0.0957秒） [XML]
Reverse a string in Python
There is no built in reverse function for Python's str object. What is the best way of implementing this method?
28 Ans...
Why use sprintf function in PHP?
I am trying to learn more about the PHP function sprintf() but php.net did not help me much as I am still confused, why would you want to use it?
...
postgresql port confusion 5433 or 5432?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
What really happens in a try { return x; } finally { x = null; } statement?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Bulk insert with SQLAlchemy ORM
...
User(name="u2"),
User(name="u3")
]
s.bulk_save_objects(objects)
s.commit()
Here, a bulk insert will be made.
share
|
improve this answer
|
follow
|
...
Using Custom Domains With IIS Express
...(Updated for VS 2013, see revision history for 2010, for VS 2015 see this: https://stackoverflow.com/a/32744234/218971):
Right-click your Web Application Project ▶ Properties ▶ Web, then configure the Servers section as follows:
Select IIS Express ▼ from the drop down
Project Url: http://lo...
Many-to-many relationship with the same model in rails?
...Simplest scenario, uni-directional, no additional fields
This is the most compact in code.
I'll start out with this basic schema for your posts:
create_table "posts", :force => true do |t|
t.string "name", :null => false
end
For any many-to-many relationship, you need a join table. Her...
Where can I get a list of Ansible pre-defined variables?
...es (AKA 'magic' variables). They are documented in Ansible documentation: http://docs.ansible.com/playbooks_variables.html#magic-variables-and-how-to-access-information-about-other-hosts
Here is the list extracted from Ansible 1.9 documentation:
group_names
groups
inventory_hostname
ansible_host...
Learning Python from Ruby; Differences and Similarities
...l read and write access to variables from the outer scope.
Python has list comprehensions, which are pretty expressive. For example, if you have a list of numbers, you can write
[x*x for x in values if x > 15]
to get a new list of the squares of all values greater than 15. In Ruby, you'd hav...
Call Go functions from C
...'t define any C functions in preamble if you're using
exports.
source: https://github.com/golang/go/wiki/cgo
share
|
improve this answer
|
follow
|
...