我想通过按钮单击一个在linux中运行程序,因此我编写了一个函数execute:
void execute(const char* program_call, const char* param )
{
pid_t child = vfork();
if(child == 0) // child process
{
int child_pid = getpid();
char *args[2]; // arguments for exec
args[0] = (char*)program_call; // first argument is program_call
args[1] = (char*)param;
// close all opened file descriptors:
const char* prefix = "/proc/";
const char* suffix = "/fd/";
char child_proc_dir[16];
sprintf(child_proc_dir,"%s%d%s",prefix,child_pid, suffix);
DIR *dir;
struct dirent *ent;
if ((dir = opendir (child_proc_dir)) != NULL) {
// get files …我研究过Tries和Suffix Trees,并希望实现相同的功能.请分享一些链接,我可以从中了解实施的结构和基本概念.
任何好的例子,如果包括在内,都会是一个加分.
在C中实施
我有这个代码,以便使用node.js上传文件:
app.use(express.bodyParser());
// or, as `req.files` is only provided by the multipart middleware, you could
// add just that if you're not concerned with parsing non-multipart uploads,
// like:
app.use(express.multipart());
app.get('/',function(req,res){
fs.readFile('uploadHTML.html',function (err, data){
res.writeHead(200, {'Content-Type': 'text/html','Content-Length':data.length});
res.write(data);
res.end();
});
});
app.post('/upload',function(req,res)
{
console.log(req.files);
fs.readFile(req.files.displayImage.path, function (err, data) {
// ...
var newPath = __dirname;
fs.writeFile(newPath, data, function (err) {
res.redirect("back");
});
});
});
这是HTML文件:
<html>
<head>
<title>Upload Example</title>
</head>
<body>
<form id="uploadForm"
enctype="multipart/form-data"
action="/upload"
method="post">
<input type="file" id="userPhotoInput" name="displayImage" …我是JAXB的新手,我想整理和解组XML/Objects to Objects/XML.
我从Sun的网站(价值22.69 MB)下载了JWSDP 2.0.
我已将环境变量设置为
JAVA_HOME :- D:\Program Files\Java\jdk1.5.0
JWSDP_HOME :- D:\Sun\jwsdp-2.0
JAXB_HOME :- D:\Sun\jwsdp-2.0\jaxb
PATH :- D:\Program Files\Java\jdk1.5.0\bin;D:\Sun\jwsdp-2.0\jwsdp-shared\bin;
我正在尝试使用XJC(存在于其中)编译一个简单的XSD文件(名为tp.xsd D:\Sun\jwsdp-2.0\jaxb\bin).
当我尝试编译它时,我得到以下输出:
D:\ Sun\jwsdp-2.0\jaxb\bin> xjc tp.xsd
parsing a schema...
compiling a schema...
generated\Bookdata.java
Exception in thread "main" java.lang.NoSuchMethodError: java.lang.Class.getSimpl
eName()Ljava/lang/String;
at com.sun.codemodel.JCodeModel$JReferencedClass.name(JCodeModel.java:54
5)
at com.sun.codemodel.JFormatter.t(JFormatter.java:283)
at com.sun.codemodel.JClass.generate(JClass.java:358)
at com.sun.codemodel.JFormatter.g(JFormatter.java:346)
at com.sun.codemodel.JAnnotationUse.generate(JAnnotationUse.java:388)
at com.sun.codemodel.JFormatter.g(JFormatter.java:346)
at com.sun.codemodel.JDefinedClass.declare(JDefinedClass.java:767)
at com.sun.codemodel.JFormatter.d(JFormatter.java:372)
at com.sun.codemodel.JFormatter.write(JFormatter.java:402)
at com.sun.codemodel.JPackage.build(JPackage.java:434)
at com.sun.codemodel.JCodeModel.build(JCodeModel.java:297)
at com.sun.codemodel.JCodeModel.build(JCodeModel.java:287)
at com.sun.tools.xjc.Driver.run(Driver.java:378)
at com.sun.tools.xjc.Driver.run(Driver.java:196)
at com.sun.tools.xjc.Driver._main(Driver.java:121)
at com.sun.tools.xjc.Driver.access$000(Driver.java:79)
at com.sun.tools.xjc.Driver$1.run(Driver.java:101) …我找不到 hibernate.cfg.xml 文件有什么问题。
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd" >
<hibernate-configuration>
<session-factory>
- <!-- Database connection settings
-->
<property name="connection.driver_class">org.h2.Driver</property>
<property name="connection.url">jdbc:h2://localhost:1527/hibernatedb</property>
<property name="connection.username">h2</property>
<property name="connection.password" />
- <!-- JDBC connection pool (use the built-in)
-->
<property name="connection.pool_size">1</property>
- <!-- Disable the second-level cache
-->
<property name="cache.provider_class">org.hibernate.cache.internal.CollectionCacheInvalidator
</property>
- <!-- Echo all executed SQL to stdout
-->
<property name="show_sql">true</property>
- <!-- Drop and re-create the database schema on startup
-->
<property name="hbm2ddl.auto">create</property>
- <!-- …我需要人们使用PHP检测设备显示分辨率的帮助.
切换界面时我的代码出现问题我有以下代码:
$_page="home";
if(get('page'))
$_page=strtolower(get('page'));
// Check if larger than 800px screen will show this code.
$_pagePath='Includes/desktop/'.$_page.'_left.php';
// Check if the screen is smaller than 800px will display this code.
$_pagePath='Includes/mobile/'.$_page.'_left.php';
if(file_exists($_pagePath))
include $_pagePath;
else
echo 'File '.$_pagePath.' not found';
请帮我完成这段代码.
我们很难将forge.prefs值赋给变量,以便我们可以将其作为参数传递.
这是一个示例电话:
forge.prefs.get('offset_val' function(offset1){
offset = offset1;
})
forge.prefs.get('id', function(val){
uid = val;
})
load_my_car(uid,offset);
它正在返回,undefined并且在嵌套的prefs命令中调用它非常不方便.
有人可以帮我们解决这个问题吗？