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How to implement a rule engine?
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+125
This snippet compiles the Rules into fast executable code (using Expression trees) and does not need any complicated switch statemen...
Compiled vs. Interpreted Languages
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A language itself is neither compiled nor interpreted, only a specific implementation of a lan...
How do you delete an ActiveRecord object?
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Nov 14 '10 at 13:50
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Check a radio button with javascript
...dentifier) with native JS.
Native JS solution:
document.getElementById("_1234").checked = true;
JQuery solution:
$("#_1234").prop("checked", true);
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Better way to check variable for null or empty string?
...('', $var) == 0)...
– peter
May 31 '12 at 20:37
12
Why ==0 and not just if (strlen($str)) ?
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实战低成本服务器搭建千万级数据采集系统 - 更多技术 - 清泛网 - 专注C/C++...
...器。到了机器后再按照天或者半天分表，比如表名为 weibo_2013020101 、weibo_2013020112。weibo_2013020101表示2月1日上午一个表，weibo_2013020112表示2月1日下午一个表。光这样分了还是不够，1000w/2=500w，经不起压力扩展。我们还需要把表再...
Selenium: FirefoxProfile exception Can't load the profile
...install -U selenium
Unclear at which version it was fixed (apparently r13122), but certainly by 2.26.0 (current at time of update) it is fixed.
This error means that _wait_until_connectable is timing out, because for some reason, the code cannot connect to the webdriver extension that has been ...
Undefined symbols for architecture arm64
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chancyWuchancyWu
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Is calculating an MD5 hash less CPU intensive than SHA family functions?
... a point of comparison, consider that a recent hard disk will run at about 100 MB/s, and anything over USB will top below 60 MB/s. Even though SHA-256 appears "slow" here, it is fast enough for most purposes.
Note that OpenSSL includes a 32-bit implementation of SHA-512 which is quite faster than m...
Manually raising (throwing) an exception in Python
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edited Feb 3 at 12:30
Daniel Holmes
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an...