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What do you call the -> operator in Ruby?
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Can I concatenate multiple MySQL rows into one field?
...byte limit on the result. To solve this, run this query before your query:
SET group_concat_max_len = 2048;
Of course, you can change 2048 according to your needs. To calculate and assign the value:
SET group_concat_max_len = CAST(
(SELECT SUM(LENGTH(hobbies)) + COUNT(*) * LENGTH(', ')
FROM...
How can I keep Bootstrap popovers alive while being hovered?
...de');
});
}).on("mouseleave", function() {
var _this = this;
setTimeout(function() {
if (!$(".popover:hover").length) {
$(_this).popover("hide");
}
}, 300);
});
<!DOCTYPE html>
<html>
<head>
<link data-require="bootstrap-css@*" data-se...
What is lazy loading in Hibernate?
...is saves the cost of preloading/prefilling all the entities in a large dataset beforehand while you after all actually don't need all of them.
In Hibernate, you can configure to lazily load a collection of child entities. The actual lazy loading is then done inside the methods of the PersistentSet ...
App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 - App Invent...
...的UUID是0x180D，使用的UUID基数是：00000000-0000-1000-8000-00805F9B34FB。厂商自定义UUID：同样采用UUID基数 + 16位UUID的形式，由厂商定义，如BLE串口服务的UUID是0x001，使用的UUID基数是：6E400001-B5A3-F393-E0A9-E50E24DCCA9E。标准16位UUID技术文档请...
How to place and center text in an SVG rectangle
...
An easy solution to center text horizontally and vertically in SVG:
Set the position of the text to the absolute center of the element in which you want to center it:
If it's the parent, you could just do x="50%" y ="50%".
If it's another element, x would be the x of that element + half its...
Url.Action parameters?
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Is it possible to include one CSS file in another?
Is it possible to include one CSS file in another?
17 Answers
17
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Disabling swap files creation in vim
...
To disable swap files from within vim, type
:set noswapfile
To disable swap files permanently, add the below to your ~/.vimrc file
set noswapfile
For more details see the Vim docs on swapfile
...
check android application is in foreground or not? [duplicate]
...sible = false;
@Override
public void onResume() {
super.onResume();
setVisible(true);
}
@Override
public void onPause() {
super.onPause();
setVisible(false);
}
Whenever you need to check if any of your application activities is in foreground just check isVisible();
To understand t...