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How to get subarray from array?
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Forms authentication timeout vs sessionState timeout
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From what I understand they are independent of one another. By keeping the session timeout less than or equal to the authentication timeout, you can make sure any user-specific session variables are not persisted after the authentication has timed out (if that is your concern, which I...
PHP function to build query string from array
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Convert a row of a data frame to vector
...c() # you expect 11 21 but it returns
[1] 1 21
Here is another example (by default data.frame() converts characters to factors)
df_2 = data.frame(V1 = letters[1:5],
V2 = 1:5)
df_2[3,] %>% as.numeric() # you expect to obtain c 3 but it returns
[1] 3 3
df_2[3,] %>% as.char...
How to convert a string to an integer in JavaScript?
...erpreted as octal if the radix wasn't specified which took a lot of people by surprise. The behaviour for hexadecimal is triggered by having the string start with 0x if no radix is specified, e.g. 0xff. The standard actually changed with ecmascript 5, so modern browsers no longer trigger octal when...
Can the C# interactive window interact with my code?
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When using Visual Studio 2015:
You can open the Interactive window by navigating to Views > Other Windows > C# Interactive,
Then just right click your project and run Initialize Interactive with Project from the context menu.
For older versions:
To use the C# Interactive Window wi...
Replace specific characters within strings
...Regular expressions is good choice for it as it has been already mentioned by @Andrie and @Dirk Eddelbuettel.
Pay attention, if you want to replace special characters, like dots, you should employ full regular expression syntax, as shown in example below:
ctr_names <- c("Czech.Republic","New.Ze...
Pass a parameter to a fixture function
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To clarify, @Maspe36 is indicating that the PR linked by Nadège was reverted. Thus, this undocumented feature (I think it's still undocumented?) still lives.
– blthayer
Jul 29 at 16:28
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Match linebreaks - \n or \r\n?
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What's the best practice for primary keys in tables?
...having artifical keys, nor of never having them. I would decide on a case-by-case basis, for example:
US States: I'd go for state_code ('TX' for Texas etc.), rather than state_id=1 for Texas
Employees: I'd usually create an artifical employee_id, because it's hard to find anything else that works...