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Socket 错误返回码详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...檔案或socket。例如在UNIX上，一般的使用者不能開啟 SOCK_RAW的socket，通常是超級使用者(super user)才有此權限。如果一般的使用者企圖開啟SOCK_RAW的socket，將會得到這個錯誤訊息。
對於WinSock API函式介面，發生此錯誤的函式有二：...
Installing R on Mac - Warning messages: Setting LC_CTYPE failed, using “C”
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What is the proper way to check for existence of variable in an EJS template (using ExpressJS)?
... name of the object containing them, you can do if (locals.foo). It's just raw js :p
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Accessing MP3 metadata with Python [closed]
...mp3", eyeD3.ID3_ANY_VERSION) # The default.
Or you can iterate over the raw frames:
tag = eyeD3.Tag()
tag.link("/some/file.mp3")
for frame in tag.frames:
print frame
Once a tag is linked to a file it can be modified and saved:
tag.setArtist(u"Cro-Mags")
tag.setAlbum(u"Age of Quarrel"...
Saving a Numpy array as an image
...ine order and add null bytes at the start
width_byte_4 = width * 4
raw_data = b''.join(
b'\x00' + buf[span:span + width_byte_4]
for span in range((height - 1) * width_byte_4, -1, - width_byte_4)
)
def png_pack(png_tag, data):
chunk_head = png_tag + data
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Using current time in UTC as default value in PostgreSQL
...lumn of the TIMESTAMP WITHOUT TIME ZONE type and would like to have that default to the current time in UTC. Getting the current time in UTC is easy:
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Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
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#start your server
rails -s
results (in browser)
- !ruby/object:Post
raw_attributes:
id: 2
title: My Second Post
body: Welcome! This is another example post
published_at: '2015-10-19 23:00:43.469520'
created_at: '2015-10-20 00:00:43.470739'
updated_at: '2015-10-20 00:0...
Android: Test Push Notification online (Google Cloud Messaging) [closed]
... : key=your key //Google API KEY
Content-Type : application/json
JSON (raw) :
{
"registration_ids":["yours"],
"data": {
"Hello" : "World"
}
}
on success you will get
Response :
{
"multicast_id": 6506103988515583000,
"success": 1,
"failure": 0,
"canonical_ids": 0,
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maximum value of int
Is there any code to find the maximum value of integer (accordingly to the compiler) in C/C++ like Integer.MaxValue function in java?
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