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When should I use Write-Error vs. Throw? Terminating vs. non-terminating errors
... message in red text on the console. It does not stop a pipeline or a loop from continuing. Throw on the other hand produces what is called a terminating error. If you use throw, the pipeline and/or current loop will be terminated. In fact all execution will be terminated unless you use a trap or a ...
Getting the encoding of a Postgres database
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A programmatic solution:
SELECT pg_encoding_to_char(encoding) FROM pg_database WHERE datname = 'yourdb';
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Search and replace in Vim across all the project files
...ck-grep.
xargs
Xargs is an old unix command line tool. It reads items from standard input and executes the command specified followed by the items read for standard input. So basically the list of files generated by ack are being appended to the end of the perl -pi -E 's/pattern/replacemnt/g' ...
How do RVM and rbenv actually work?
... practical difference between RVM and rbenv is when the version of Ruby is selected.
rbenv:
rbenv adds a shim to the start of your path, a command with the same name as Ruby. When you type ruby at a command line the shim is run instead (because it is also called "ruby" and comes first in the path)...
Is there a predefined enumeration for Month in the .NET library?
...es = DateTimeFormatInfo.CurrentInfo.MonthNames.Take(12).ToList();
var monthSelectList = monthNames.Select(
m => new { Id = monthNames.IndexOf(m) + 1, Name = m });
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How to use the pass statement?
...ly understand what it does. Is there a use for this in production code? From your example, I would opt to just not add that method until I'm ready to implement it, or I would simply do return.
– theUtherSide
Aug 28 '18 at 20:00
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How to determine whether code is running in DEBUG / RELEASE build?
...processor Macros' for debug to ensure that DEBUG is being set - do this by selecting the project and clicking on the build settings tab. Search for DEBUG and look to see if indeed DEBUG is being set.
Pay attention though. You may see DEBUG changed to another variable name such as DEBUG_MODE.
th...
What is a StackOverflowError?
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No, stack overflows can also come from variables being too big to allocate on the stack if you look up the Wikipedia article on it at en.wikipedia.org/wiki/Stack_overflow .
– JB King
Nov 4 '08 at 23:30
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How to get the raw value an field?
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Spudly has a useful answer that he deleted:
Just use the CSS :invalid selector for this.
input[type=number]:invalid {
background-color: #FFCCCC;
}
This will trigger your element to turn red whenever a non-numeric
valid is entered.
Browser support for <input type='number'>...
解决：ORA-01658: 无法为表空间space中的段创建 INITIAL 区 - 数据库(内核)...
...们对应的表空间大小有多少：
1、查看表空间总大小SQL：select tablespace_name,sum(bytes)/1024/1024 from dba_data_files group by tablespace_name;
2、查看表空间已使用大小及分配情况：
select SEGMENT_TYPE,owner,sum(bytes)/1024/1024 from dba_segments where tablesp...