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What is the proper way to check for existence of variable in an EJS template (using ExpressJS)?
...otype.slice.call(arguments, 0);
var path = args[0].split('.');
var root = this;
for (var i = 0; i < path.length; i++) {
if(root[path[i]] === void 0) {
return args[1]?args[1]:null;
} else {
root = root[path[i]];
}
};
return root;
...
Java 理论与实践: 线程池与工作队列 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... POP）、通过 JMS 队列或者可能通过轮询数据库。不管请求如何到达，服务器应用程序中经常出现的情况是：单个任务处理的时间很短而请求的数目却是巨大的。
构建服务器应用程序的一个过于简单的模型应该是：每当一个请求...
Logging uncaught exceptions in Python
...ere is the output with sys.excepthook as seen above:
$ python tb.py
ERROR:root:Unhandled exception: Traceback (most recent call last):
File "tb.py", line 11, in <module>
None()
TypeError: 'NoneType' object is not callable
Here is the output with the sys.excepthook commented out:
$ py...
How do I get an apk file from an Android device?
...missions to access the directory your file is in. If not, you will need to root the device first.
If you find that many of the APKs are named "base.apk" you can also use this one line command to pull all the APKs off a phone you can access while renaming any "base.apk" names to the package name. ...
How to use PyCharm to debug Scrapy projects
...rfect. make sure the working directory is pointing to your scrapy project root where scrapy.cfg is located.
– Nour Wolf
Jan 18 '15 at 2:31
3
...
Flask raises TemplateNotFound error even though template file exists
...lled package, make sure template files are present in directory <python root>/lib/site-packages/your-package/templates.
Some details:
In my case I was trying to run examples of project flask_simple_ui and jinja would always say
jinja2.exceptions.TemplateNotFound: form.html
The trick ...
String isNullOrEmpty in Java? [duplicate]
...that when I tried to use StringUtils my IDE (Eclipse) imported it from com.mysql.jdbc.StringUtils which actually has an isNullOrEmpty(myStringObject) method.
ex.
import com.mysql.jdbc.StringUtils;
StringUtils.isNullOrEmpty(host)
Just another alternative for those who already have the MySQL conne...
创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...from t_mv_test@dblink_name;
这样，不管数据库A上的此表的主键如何变化，我一概不管。但是，有时必须要使用with primary key，例如跨库跨平台时。
物化视图对应的表上没有主键，如果需要索引可以另行添加。
最后小结一下，这个...
千亿时代 网游走到十字路口 - 资讯 - 清泛网 - 专注C/C++及内核技术
...能再缓的端游还能挺多久？手游作为游戏增长最大驱动力如何面临资本降温和淘汰加速的考验？电视游戏（包括主机游戏等）能不能接过力促增长的枪？虚拟现实是噱头还是真正的行业未来？这是个十字路口。
结构性调整
China...
SQL - Select first 10 rows only?
...
select top 100 * from myTable
select top 100 colA, colB from myTable
In MySQL, use:
select ... order by num desc limit 10
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