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RSpec controller testing - blank response.body
...my controllers with RSpec - the response.body call always returns an empty string. In browser everything renders correctly, and cucumber feature tests seem to get it right, but RSpec fails each and every time.
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Best way to write to the console in PowerShell
... writes to the console, not to the pipeline (Do-Something will not get the string):
Write-Host "hello world" | Do-Something
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Reorder levels of a factor without changing order of values
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I wish to add another case where the levels could be strings carrying numbers alongwith some special characters : like below example
df <- data.frame(x = c("15-25", "0-4", "5-10", "11-14", "100+"))
The default levels of x is :
df$x
# [1] 15-25 0-4 5-10 11-14 100+
# L...
What is the difference between the | and || or operators?
...c class Driver {
static int x;
static int y;
public static void main(String[] args)
throws Exception {
System.out.println("using double pipe");
if(setX() || setY())
{System.out.println("x = "+x);
System.out.println("y = "+y);
}
System.out.println("using single ...
How to rethrow InnerException without losing stack trace in C#?
...lls SetObjectData
// voila, e is unmodified save for _remoteStackTraceString
}
This wastes a lot of cycles compared to calling InternalPreserveStackTrace via cached delegate, but has the advantage of relying only on public functionality. Here are a couple of common usage patterns for stack-tr...
Best way to test SQL queries [closed]
...nd a case statement catenated together. The test name is just an arbitrary string. The case statement is just case when test statements then 'passed' else 'failed' end.
The test statements will just be SQL selects (subqueries) that must be true for the test to pass.
Here's our first test:
--a s...
Why does Maven warn me about encoding?
...er encoding scheme to be applied when filtering resources.
Type: java.lang.String
Required: No
User Property: encoding
Default: ${project.build.sourceEncoding}
So this means you only need to define this property and the plugin will automatically use this encoding.
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Loop through all nested dictionary values?
...lso easy to modify it to track the prefix as a tuple of keys rather than a string if you need it that way.
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Warning: push.default is unset; its implicit value is changing in Git 2.0
...than the instruction telling us to open the documentation and search for a string.
– hertzsprung
Aug 4 '13 at 17:18
116
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MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...ds names - 1 per line
-q [ --query ] arg query filter, as a JSON string
--csv export to csv instead of json
-o [ --out ] arg output file; if not specified, stdout is used
--jsonArray output to a json array rather than one object per
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