大约有 7,000 项符合查询结果(耗时:0.0218秒) [XML]

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How do I parse a string to a float or int?

...temptible lie False True So false it becomes true "123.456" True Decimal " -127 " True Spaces trimmed "\t\n12\r\n" True whitespace ignored "NaN" True Not a number "NaNanananaBATMAN" False ...
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微软推出Win10物联网版 新系统要“无处不在” - 资讯 - 清泛网 - 专注C/C++及内核技术

...本一起渗透到人们的生活和工作中,成为真正无处不在的操作系统。 今年3月,微软就发布了Win 10的物联网版本,意在使和其他版本一起渗透到人们的生活和工作中,成为真正无处不在的操作系统。 距离Windows 10的家庭版、专业...
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Linux btrfs 文件系统不稳定,不能用于生产环境 - 操作系统(内核) - 清泛网...

Linux btrfs 文件系统不稳定,不能用于生产环境经验之谈:Linux btrfs 文件系统不稳定,不能用于生产环境。btrfs文件系统,发展了近20年,但还是不稳定,生产环境不要使用,否则机器重启很可能导致文件系统变成只读了,而且数...
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http HEAD vs GET performance

...EAD might work nicely. For example, suppose you want to check if resource 123 exists. A 200 means "yes" and a 404 means "no": HEAD /resources/123 HTTP/1.1 [...] HTTP/1.1 404 Not Found [...] However, if the "yes" or "no" you want from your REST service is a part of the resource itself, rather th...
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jQuery Data vs Attr?

...you'll need to use .attr(): HTML: <a id="foo" href="#" data-color="ABC123"></a> <a id="bar" href="#" data-color="654321"></a> JS: $('#foo').data('color').length; //6 $('#bar').data('color').length; //undefined, length isn't a property of numbers $('#foo').attr('data-col...
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理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

理解和配置 Linux 下的 OOM Killerhow-to-configure-the-linux-oom-killer最近有位 VPS 客户抱怨 MySQL 无缘无故挂掉,还有位客户抱怨 VPS 经常死机,登陆到终端看了一下,都是常见的 Out of memory 问题。这通常是因为某时刻应用程序大量请求 最...
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Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...很自然连贯(帧率为24fps),用手机当然也需要感知屏幕操作的连贯性(尤其是动画过度),所以Android索性就把达到这种流畅的帧率规定为60fps。 有了上面的背景,我们开发App的帧率性能目标就是保持在60fps,也就是说我们在进...
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How do I perform an insert and return inserted identity with Dapper?

...Username = "lorem ipsum", Phone = "555-123", Email = "lorem ipsum" }, tran); Return inserted object with ID: If you wanted you could get Phone and Email or even th...
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Strangest language feature

... Or, more usefully, "0123456789abcdef"[x & 0xf] – Dipstick Jan 3 '10 at 15:33 17 ...
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Download JSON object as a file from browser

... Found an answer. var obj = {a: 123, b: "4 5 6"}; var data = "text/json;charset=utf-8," + encodeURIComponent(JSON.stringify(obj)); $('<a href="data:' + data + '" download="data.json">download JSON</a>').appendTo('#container'); seems to work f...