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Scroll to the top of the page using JavaScript?
... - I'd just use the native JavaScript window.scrollTo method -- passing in 0,0 will scroll the page to the top left instantly.
window.scrollTo(x-coord, y-coord);
Parameters
x-coord is the pixel along the horizontal axis.
y-coord is the pixel along the vertical axis.
...
Dynamically generating a QR code with PHP [closed]
...update.
To use this , basically:
https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=http%3A%2F%2Fwww.google.com%2F&choe=UTF-8
300x300 is the size of the QR image you want to generate,
the chl is the url-encoded string you want to change into a QR code, and
the choe is the (op...
Delete files older than 3 months old in a directory using .NET
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answered Feb 8 '10 at 14:57
Steve DannerSteve Danner
20.3k77 gold badges3333 silver badges4848 bronze badges
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Data Modeling with Kafka? Topics and Partitions
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answered Jun 20 '13 at 13:57
LundahlLundahl
5,44811 gold badge3232 silver badges3333 bronze badges
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How can I use Python to get the system hostname?
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1095
Use socket and its gethostname() functionality. This will get the hostname of the computer whe...
What is the advantage of using forwarding references in range-based for loops?
...der:
#include <vector>
int main()
{
std::vector<bool> v(10);
for (auto& e : v)
e = true;
}
This doesn't compile because rvalue vector<bool>::reference returned from the iterator won't bind to a non-const lvalue reference. But this will work:
#include <v...
AsyncProcedures异步过程扩展 · App Inventor 2 中文网
...for each item in dataList
// 模拟耗时处理
call wait 100
// 处理数据项
add item * 2 to ProcessedData
// 返回处理结果
return ProcessedData
// 处理完成后的回调
when AsyncProcedures1.ProcedureCompletedWithResult result
do
set Result...
How to use NULL or empty string in SQL
...odingbadger
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14
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How to install and run phpize
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For recent versions of Debian/Ubuntu (Debian 9+ or Ubuntu 16.04+) install the php-dev dependency package, which will automatically install the correct version of php{x}-dev for your distribution:
sudo apt install php-dev
Older versions of Debian/Ubuntu:
For PHP 5, it's in the php5-...
Using margin:auto to vertically-align a div
So I know we can center a div horizontally if we use margin:0 auto; . Should margin:auto auto; work how I think it should work? Centering it vertically as well?
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