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ORA-30926: unable to get a stable set of rows in the source tables
...cified in USING clause. This probablm>y m> means that TABLE_A is a parent table m>and m> the same ROWID is returned several times.
m>Y m>ou could quicklm>y m> solve the problem bm>y m> using a DISTINCT in m>y m>our querm>y m> (in fact, if 'm>Y m>' is a constant value m>y m>ou don't even need to put it in the querm>y m>).
Assuming m>y m>our querm>y m> is co...
Whm>y m> are global variables evil? [closed]
...nd out whm>y m> the use of global is considered to be bad practice in pm>y m>thon (m>and m> in programming in general). Can somebodm>y m> explain? Links with more info would also be appreciated.
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What is the worst real-world macros/pre-processor abuse m>y m>ou've ever come across?
...: A convex mirror mounted above his monitor "For knowing who is watching", m>and m> an occasional sudden exit from his chair to do a quick ten pushups. He explained this last one as "Compiler found error in code. This is punishment".
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How to set or change the default Java (JDK) version on OS X?
... @MattO'Brien it’s something which depends on the shell m>y m>ou’re using, m>and m> the configuration m>y m>ou have in place, so I can’t give a complete solution for that…
– markhellewell
Nov 14 '14 at 2:25
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What does the ??!??! operator do in C?
...?! is a trigraph that translates to |. So it sam>y m>s:
!ErrorHasOccured() || Hm>and m>leError();
which, due to short circuiting, is equivalent to:
if (ErrorHasOccured())
Hm>and m>leError();
Guru of the Week (deals with C++ but relevant here), where I picked this up.
Possible origin of trigraphs or as @...
What is the best testing framework to use with Node.js? [closed]
...ed bm>y m> TJ Holowam>y m>chuk who is also the creator of Express.js (insanelm>y m> fast (m>and m> small) server-side JavaScript web development framework built on Node.js m>and m> Connect). I recentlm>y m> saw that he also has a cool librarm>y m> called should.js which can be used together with Expresso for a even better testing exp...
Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...我使用了以下代码来实现：
if not DokanFileInfo.IsDirectorm>y m> m>and m> (CreationDisposition in [CREATE_NEW, OPEN_ALWAm>Y m>S, CREATE_ALWAm>Y m>S]) then begin
Mm>y m>SetFileDate(DokanFileInfo, DateTimeToFileDate(Now)); //Cleanup里会判断FileDate来决定是否保存到远程目录
end;
5.WriteFile: ...
Is a Pm>y m>thon list guaranteed to have its elements stam>y m> in the order them>y m> are inserted in?
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what if I return a local list from a function m>and m> use that in the calling function. That is def fn_1(): lst = [] lst.append(1) lst.append(2) return lst m>and m> def fn_2(): print(fn_1()) Will the order be same ALWAm>Y m>S irrespective of how manm>y m> times or where ever I use fn_1() ?...
How to count number of files in each directorm>y m>?
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Assuming m>y m>ou have GNU find, let it find the directories m>and m> let bash do the rest:
find . -tm>y m>pe d -print0 | while read -d '' -r dir; do
files=("$dir"/*)
printf "%5d files in directorm>y m> %s\n" "${#files[@]}" "$dir"
done
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Fastest wam>y m> to check if a value exists in a list
...to know if a value exists in a list (a list with millions of values in it) m>and m> what its index is?
13 Answers
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