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quick random row selection in Postgres
... make It sense to use a N less than SELECT COUNT(*)?, I mean, not use all the values in the table but only a part of them?
– Juan
Mar 14 '11 at 11:00
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Get current date/time in seconds
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@Nick - I think all examples are necessarily speculative and will sound contrived - but I'll take a shot :) Suppose you have data time stamped with unix time, and want to determine it's age. More though I think this is what is most likely me...
What are the main disadvantages of Java Server Faces 2.0?
...ts which seem to make development much faster than with ASP.NET MVC, especially on AJAX-heavy sites. Integration testing looked very nice too.
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HTML if image is not found
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Seems works in all major browsers. Just swap default and original. So that object renders original image and img default one
– Evgeny
Dec 16 '14 at 10:28
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How to break nested loops in JavaScript? [duplicate]
...ested loops by moving inner loops to separate functions, it will run marginally slower because of the extra function calls.
– Tim Down
Oct 14 '09 at 10:39
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Smooth scroll to div id jQuery
...}); Explanation: .basics-content is the inner div of the modal which I actually want to scroll to, with target I provide the id number of the element ...
– Roland
Nov 14 '17 at 10:35
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Discuz 证件类型下拉框不显示的解决方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...题的，放心使用！
找到文件 \source\admincp\admincp_members.php ，搜索代码共两处：
C::t('common_member_profile_setting')->update('idcardtype', $setarr);
改为：
C::t('common_member_profile_setting')->update('idcard', $setarr);
这样就OK了，以后不会再毛病了...
git add all except ignoring files in .gitignore file
...roject that had none. The problem is that there are a lot of files to initially add to git with a .gitignore file, but I can't figure out how to add all files without including the files matching something in the .gitignore file.
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Breaking out of a nested loop
...using goto is any worse than the normal use of something like break (after all they're both just unconditional branches to a label, it's just that with break the label is implicit).
– Greg Beech
Nov 28 '08 at 0:07
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Check if an array is empty or exists
...y" !== "array"
typeof array == "undefined"; // => true
Case Null
Generally speaking, null is state of lacking a value. For example a variable is null when you missed or failed to retrieve some data.
array = searchData(); // can't find anything
array == null; // => true
Case Not a...