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深入浅出计算机字符集编码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...缘由：前面页面编码方式统一为UTF-8，后台代码（包括UT测试代码）以EUC_JP编码，要求前台输入日文半角片假名后台通过正则表达式能够验证通过，正则表达式为“^(([\x20-\x7e])|(\x8e[\xa6-\xdf])){1,32}$“。现在问题是UT测试代码能够通...
Put icon inside input element in a form
... a div.
<div style="border: 1px solid #DDD;">
<img src="icon.png"/>
<input style="border: none;"/>
</div>
Not as "clean", but should work on older browsers.
share
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...
Reduce left and right margins in matplotlib plot
...ata = np.arange(3000).reshape((100,30))
plt.imshow(data)
plt.savefig('test.png', bbox_inches='tight')
Another way is to use fig.tight_layout()
import matplotlib.pyplot as plt
import numpy as np
xs = np.linspace(0, 1, 20); ys = np.sin(xs)
fig = plt.figure()
axes = fig.add_subplot(1,1,1)
axes.plo...
What is the minimum I have to do to create an RPM file?
...sr/share/applications/package_name.desktop
/usr/share/pixmaps/package_name.png
%changelog
* date Packager's Name <packager's_email> version-revision
- Summary of changes
#For more details see: docs.fedoraproject.org/en-US/Fedora_Draft_Documentation/0.1/html/Packagers_Guide/sect-Packagers_Gui...
App Inventor 2 字典代码块 · App Inventor 2 中文网
...字典中的值。
键是否在字典中？
键是否在字典中？ 测试字典中是否存在该键，如果存在则返回 真，否则返回 假。
字典的长度
字典的长度 块返回字典中存在的键值对的数量。
键值对列表转换为字典
将((key1 value1) (k...
How to take a screenshot programmatically on iOS
...entImageContext();
UIGraphicsEndImageContext();
NSData *imageData = UIImagePNGRepresentation(image);
if (imageData) {
[imageData writeToFile:@"screenshot.png" atomically:YES];
} else {
NSLog(@"error while taking screenshot");
}
...
How to add an image to a JPanel?
I have a JPanel to which I'd like to add JPEG and PNG images that I generate on the fly.
14 Answers
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How can I tell if my server is serving GZipped content?
...g gzipped.
Compare that to this very page that you are on and look at a png file, you will see no such designation.
Just to be clear, it isn't because one is a jpg and one is a png. It is because one is gzipped and the other one isn't.
Previous Answer
In Chrome, if you pull up the Develope...
How to darken a background using CSS?
...t.net/fs71/i/2011/274/6/f/ocean__sky__stars__and_you_by_muddymelly-d4bg1ub.png);
}
Reference: linear-gradient() - CSS | MDN
UPDATE: Not all browsers support RGBa, so you should have a 'fallback color'. This color will be most likely be solid (fully opaque) ex:background:rgb(96, 96, 96)....
浅谈TCP优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...BDP / (1 – 1 / 2^tcp_adv_win_scale)
此外，提醒一下延迟的测试方法，BDP中的延迟指的就是RTT，通常使用ping命令很容易就能得到它，但是如果 ICMP 被屏蔽，ping也就没用了，此时可以试试 synack。
如何调整「cwnd」到一个合理值
一...