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MongoDB与内存 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
...p命令结果：
shell> top -p $(pidof mongod)
Mem: 32872124k total, 30065320k used, 2806804k free, 245020k buffers
Swap: 2097144k total, 100k used, 2097044k free, 26482048k cached
VIRT RES SHR %MEM
1892g 21g 21g 69.6
这台MongoDB服务器有没有性能问题？大家可...
Places where JavaBeans are used?
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edited Jun 20 at 9:12
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111 silver badge
answered Nov 13 '09 at 13:36
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ggplot with 2 y axes on each side and different scales
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109
Sometimes a client wants two y scales. Giving them the "flawed" speech is often pointless. But ...
Check if string begins with something? [duplicate]
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Use stringObject.substring
if (pathname.substring(0, 6) == "/sub/1") {
// ...
}
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How do I get the width and height of a HTML5 canvas?
... and height attributes are not present in the canvas element, the default 300x150 size will be returned. To dynamically get the correct width and height use the following code:
const canvasW = canvas.getBoundingClientRect().width;
const canvasH = canvas.getBoundingClientRect().height;
Or using th...
Check if a string has white space
...e input string:
function hasWhiteSpace(s) {
return s.indexOf(' ') >= 0;
}
Or you can use the test method, on a simple RegEx:
function hasWhiteSpace(s) {
return /\s/g.test(s);
}
This will also check for other white space characters like Tab.
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Logging levels - Logback - rule-of-thumb to assign log levels
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edited Aug 9 '19 at 5:20
Chege
29544 silver badges88 bronze badges
answered Nov 5 '11 at 16:40
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HTML 5 Favicon - Support?
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The above covers IE up to IE 9. IE 11 accepts PNG favicons, however, IE 10 does not. Also IE 10 does not read conditional comments thus IE 10 won't show a favicon. With IE 11 and Edge available I don't see IE 10 in widespread use, so I ignore this browser.
For the rest of the browsers we are goin...
SVG图像加载扩展 - 第三方扩展集合 · App Inventor 2 中文网
...素。
Opacity不透明度
设置SVG图像的不透明度，范围为0.0-1.0。
Rotation旋转角度
设置SVG图像的旋转角度，单位为度。
ScaleX水平缩放
设置SVG图像的水平缩放比例。
ScaleY垂直缩放
设置SVG图像的垂直缩放比例。
方...
How to display long messages in logcat
... to display long message on logcat. If the length of message is more than 1000 characters, it gets broken.
10 Answers
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