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Error: free(): invalid next size (fast):
What is this strange error I'm getting? I'm compiling C++ using g++ on Ubuntu 10.10. It pops up randomly when I run the executable (maybe 2 times in 8 hours, with 10 compiles an hour). However, if I make clean and recompile it goes away most of the time.
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Hexadecimal To Decimal in Shell Script
...The error as reported appears when the variables are null (or empty):
$ unset var3 var4; var5=$(($var4-$var3))
bash: -: syntax error: operand expected (error token is "-")
That could happen because the value given to bc was incorrect. That might well be that bc needs UPPERcase values. It needs BF...
How to detect if a stored procedure already exists
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If you DROP and CREATE the procedure, you will loose the security settings. This might annoy your DBA or break your application altogether.
What I do is create a trivial stored procedure if it doesn't exist yet. After that, you can ALTER the stored procedure to your liking.
IF object_id...
Appending an element to the end of a list in Scala
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How is CountDownLatch used in Java Multithreading?
...d consider the non-reusability an advantage: you're sure that no one can reset it, or increase the count.
– ataulm
Mar 16 '15 at 9:38
3
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Error on renaming database in SQL Server 2008 R2
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You could try setting the database to single user mode.
https://stackoverflow.com/a/11624/2408095
use master
ALTER DATABASE BOSEVIKRAM SET SINGLE_USER WITH ROLLBACK IMMEDIATE
ALTER DATABASE BOSEVIKRAM MODIFY NAME = [BOSEVIKRAM_Delete...
Change a Git remote HEAD to point to something besides master
How do I set a Git remote's HEAD reference to point to something besides "master"?
11 Answers
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mongodb group values by multiple fields
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App Inventor 2 数学积木的9个隐藏用法：随机种子、位运算、取整陷阱，踩中...
...通信协议或处理硬件返回值时特别顺手。
技巧2：random set seed 让"随机"变得可复现
做测试或教学演示时，随机数每次不一样反而不好调试。random set seed to 块可以固定随机数序列——只要种子相同，后续所有随机数的...
how to exclude null values in array_agg like in string_agg using postgres?
If I use array_agg to collect names, I get my names separated by commas, but in case there is a null value, that null is also taken as a name in the aggregate. For example :
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