大约有 2,600 项符合查询结果(耗时:0.0088秒) [XML]
浅谈Heatmap:网页热点图生成原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...用AWK来解析日志,当然你也可以使用Perl或别的你熟悉的语言:
#!/usr/bin/awk -f
BEGIN {
FS="&";
}
NF == 4 {
param["page_x"] = "0";
param["page_y"] = "0";
param["screen_width"] = "0";
param["screen_height"] = "0";
split($0,...
What does the PHP error message “Notice: Use of undefined constant” mean?
...option constants for round() such as PHP_ROUND_HALF_DOWN only exist in PHP 5.3 or later.
So if you tried to use this feature in PHP 5.2, say:
$rounded = round($my_var, 0, PHP_ROUND_HALF_DOWN);
You'd get this error message:
Use of undefined constant PHP_ROUND_HALF_DOWN - assumed
'PHP_ROUND_...
cleanest way to skip a foreach if array is empty [duplicate]
...
Since PHP 5.3, it is possible to leave out the middle part of the ternary operator. So it may become foreach (($result ?: array()) as $item). And if $result may be null, then php 7 introduced null coalescing operator foreach (($result ...
谈谈创业公司技术的工作模式 - 资讯 - 清泛网 - 专注C/C++及内核技术
...,根据人来选择不同的工作模式,就像豆瓣CEO说的,什么语言工具技术都没关系,最重要的是人、团队。相信经过大家的磨合, 每一个都是超人(技能、沟通、合作)的团队就是这么诞生的。
原创文章,转载请注明: 转载自...
PHP passing $_GET in linux command prompt
... It's worth noting that, on our Centos 6 machine running PHP 5.3, calling php [script name] "a=1&b=2&c=3" will not populate the $_SERVER['QUERY_STRING'], but you can easily affect the same thing by referencing $_SERVER['argv'][1].
– Eric L.
...
Get the client IP address using PHP [duplicate]
...
In PHP 5.3 or greater, you can get it like this:
$ip = getenv('HTTP_CLIENT_IP')?:
getenv('HTTP_X_FORWARDED_FOR')?:
getenv('HTTP_X_FORWARDED')?:
getenv('HTTP_FORWARDED_FOR')?:
getenv('HTTP_FORWARDED')?:
getenv('REMOTE_ADDR');
...
Are negative array indexes allowed in C?
...
Found it in K&R Section 5.3, near the end: If one is sure that the elements exist, it is also possible to index backwards in an array; p[-1], p[-2], and so on are syntactically legal, and refer to the elements that immediately precede p[0]. Of cours...
C# Xml中SelectSingleNode方法中的xpath用法(Xml节点操作最佳方式) - 更...
...# Xml SelectSingleNode xpathXPath 是一门在 XML 文档中查找信息的语言,可用来在 XML 文档中对元素和属性进行遍历。因此使用xpath进行XML节点操作为我们省去了很多逻辑,代码最简单优雅。同时,对 XPath 的理解是很多高级 XML 应用的基...
C# Xml中SelectSingleNode方法中的xpath用法(Xml节点操作最佳方式) - 更...
...# Xml SelectSingleNode xpathXPath 是一门在 XML 文档中查找信息的语言,可用来在 XML 文档中对元素和属性进行遍历。因此使用xpath进行XML节点操作为我们省去了很多逻辑,代码最简单优雅。同时,对 XPath 的理解是很多高级 XML 应用的基...
C# Xml中SelectSingleNode方法中的xpath用法(Xml节点操作最佳方式) - 更...
...# Xml SelectSingleNode xpathXPath 是一门在 XML 文档中查找信息的语言,可用来在 XML 文档中对元素和属性进行遍历。因此使用xpath进行XML节点操作为我们省去了很多逻辑,代码最简单优雅。同时,对 XPath 的理解是很多高级 XML 应用的基...
