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What's the function like sum() but for multiplication? product()?
...Older info: Python 3.7 and prior
The function you're looking for would be called prod() or product() but Python doesn't have that function. So, you need to write your own (which is easy).
Pronouncement on prod()
Yes, that's right. Guido rejected the idea for a built-in prod() function because he t...
Saving image from PHP URL
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If you have allow_url_fopen set to true:
$url = 'http://example.com/image.php';
$img = '/my/folder/flower.gif';
file_put_contents($img, file_get_contents($url));
Else use cURL:
$ch = curl_init('http://example.com/image.php');
$fp = f...
Redirecting stdout to “nothing” in python
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A nice way to do this is to create a small context processor that you wrap your prints in. You then just use is in a with-statement to silence all output.
Python 2:
import os
import sys
from contextlib import contextmanager
@contextmanager
def silence_stdout():
...
How to show multiline text in a table cell
...e CSS white-space:pre applied to the appropriate <td>. To do this to all table cells, for example:
td { white-space:pre }
Alternatively, if you can change your markup, you can use a <pre> tag around your content. By default web browsers use their user-agent stylesheet to apply the sam...
Android - SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
I have the following layout (virtually empty):
18 Answers
18
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Getting started with F# [closed]
...nent to Visual Studio 2012 Express for Web.
Alternatively you can also install the VS2010 integrated shell (free download). Then install the CTP MSI, for a free VS2010 version of F# 2.0.
MonoDevelop:
You can find lots of information about using F# within MonoDevelop here. The F# compiler and fs...
scipy.misc module has no attribute imread?
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You need to install Pillow (formerly PIL). From the docs on scipy.misc:
Note that Pillow is not a dependency of SciPy but the image manipulation functions indicated in the list below are not available without it:
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imread
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php中json_decode()和json_encode()的使用方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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echo "Unicode: ", json_encode($a, JSON_UNESCAPED_UNICODE), "\n";
echo "All: ", json_encode($a, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP | JSON_UNESCAPED_UNICODE), "\n\n";
$b = array();
echo "Empty array output as array: ", json_encode($b), "\n";
echo "Empty array out...
Understanding reference counting with Cocoa and Objective-C
...view to playing with the iPhone SDK. I'm reasonably comfortable with C's malloc and free concept, but Cocoa's references counting scheme has me rather confused. I'm told it's very elegant once you understand it, but I'm just not over the hump yet.
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List directory tree structure in python?
I know that we can use os.walk() to list all sub-directories or all files in a directory. However, I would like to list the full directory tree content:
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