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Why use Ruby instead of Smalltalk? [closed]
...hrough its adolescence. There are a lot of similarities between Ruby and Smalltalk -- maglev is a testament to that. Despite having a more unusual syntax, Smalltalk has all (if not more) of the object-oriented beauty of Ruby.
...
What does “javascript:void(0)” mean?
...rator is often used merely
to obtain the undefined primitive
value, usually using “void(0)” (which
is equivalent to “void 0”). In these
cases, the global variable undefined
can be used instead (assuming it has
not been assigned to a non-default
value).
An explanation is provi...
Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
... the crash you may need to setup a swap space for your micro instance. Actually performance wise is better to enable swap.
Steps below show how to make a swap space for your Micro instance. I assume you have AWS Account with a Micro instance running.
Run dd if=/dev/zero of=/swapfile bs=1M count=102...
What is normalized UTF-8 all about?
....
Compatibility Normalization
Unicode also includes many characters that really do not belong, but were used in legacy character sets. Unicode added these to allow text in those character sets to be processed as Unicode, and then be converted back without loss.
Compatibility normalization converts t...
Is D a credible alternative to Java and C++? [closed]
...of a programming language for real-world software development is only partially related to the quality of the language itself. As a pure language, D arguably has many advantages over C++ and Java. At the very least it is a credible alternative as a pure language, all other things being equal.
How...
Assign output of os.system to a variable and prevent it from being displayed on the screen [duplicat
...ne("cat /etc/services")
print cmdline('ls')
print cmdline('rpm -qa | grep "php"')
print cmdline('nslookup google.com')
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Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
...。
异步的，耗时的数据请求：传统的UDF函数存在的一个问题是，他是同步的，就是说，如果某个函数的执行时间过长，会导致前端界面的卡顿，尤其是在UDF函数访问数据库，WebService，或复杂的计算过程等不确定性及耗时的执行...
How can I convert an image into a Base64 string?
...m i can put that String (encondedImage) into a remote database column with PHP+JSON ???? wich type haves to be the column of the database? VARCHAR?
– NullPointerException
Jan 28 '11 at 19:46
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Entity Attribute Value Database vs. strict Relational Model Ecommerce
...l entities "properly", but add "extensions" for custom attributes for some/all entities)
Pro/Con: more time required to gather requirements and design than option 1 but perhaps not as much as option 2 *
Con: new entities must be modelled and designed by a professional
Pro: new attributes might be ...
How do I make JavaScript beep?
...h="0" height="0" id="sound1"
enablejavascript="true">
You would then call it from JavaScript code as such:
PlaySound("sound1");
This should do exactly what you want - you'll just need to find/create the beep sound yourself, which should be trivial.
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