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二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的Version尺寸编成9, 11或13个二进制（如下表中Table 3）
Byte mode, 字节编码，可以是0-255的ISO-8859-1字符。有些二维码的扫描器可以自动检测是否是UTF-8的编码。
Kanji mode 这是日文编码，也是双字节编码。同样，也可以用于中文编码...
How do I split a string so I can access item x?
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You may find the solution in SQL User Defined Function to Parse a Delimited String helpful (from The Code Project).
You can use this simple logic:
Declare @products varchar(200) = '1|20|3|343|44|6|8765'
Declare @individual ...
How to truncate string using SQL server
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If you only want to return a few characters of your long string, you can use:
select
left(col, 15) + '...' col
from yourtable
See SQL Fiddle with Demo.
This will return the first 15 characters of the string and then conca...
How to change cursor from pointer to finger using jQuery?
This is probably really easy, but I've never done it before. How do you change your cursor to the finger (like for clicking on links) instead of the regular pointer?
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What is the difference between “expose” and “publish” in Docker?
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Basically, you have three options:
Neither specify EXPOSE nor -p
Only specify EXPOSE
Specify EXPOSE and -p
1) If you specify neither EXPOSE nor -p, the service in the container will only be accessible from inside the container it...
How to set default value for form field in Symfony2?
Is there an easy way to set a default value for text form field?
22 Answers
22
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PostgreSQL wildcard LIKE for any of a list of words
... a simple list of ~25 words. I have a varchar field in PostgreSQL, let's say that list is ['foo', 'bar', 'baz'] . I want to find any row in my table that has any of those words. This will work, but I'd like something more elegant.
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Animate scroll to ID on page load
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You are only scrolling the height of your element. offset() returns the coordinates of an element relative to the document, and top param will give you the element's distance in pixels along the y-axis:
$("html, body").anima...
Change x axes scale in matplotlib
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Try using matplotlib.pyplot.ticklabel_format:
import matplotlib.pyplot as plt
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plt.ticklabel_format(style='sci', axis='x', scilimits=(0,0))
This applies scientific notation (i.e. a x 10^b) to your x-axis tickmarks
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Why can I use auto on a private type?
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The rules for auto are, for the most part, the same as for template type deduction. The example posted works for the same reason you can pass objects of private types to template functions:
template <typename T>
void fun(T t) {}
int main() {
Foo f;
fun(f.Baz()); // ok
}...