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Create RegExps on the fly using string variables
...e commonly you want to replace all occurrences, in which case, you have to convert the string into a global (/.../g) RegExp. You can do this from a string using the new RegExp constructor:
new RegExp(string_to_replace, 'g')
The problem with this is that any regex-special characters in the string ...
What's the difference between String(value) vs value.toString()
...cation, the [[DefaultValue]] internal operation.
Briefly summarized, when converting from Object-to-String, the following steps are taken:
If available, execute the toString method.
If the result is a primitive, return result, else go to Step 2.
If available, execute the valueOf method.
If t...
Mean per group in a data.frame [duplicate]
...0.33333
#3 Cat 2 44.66667 54.00000
Using data.table:
# At first, I convert the data.frame to data.table and then I group it
setDT(d)
d[, .(Rate1 = mean(Rate1), Rate2 = mean(Rate2)), by = .(Name)]
# Name Rate1 Rate2
#1: Aira 16.33333 47.00000
#2: Ben 31.33333 50.33333
#3: Cat 44.66...
How to save an activity state using save instance state?
...;
savedInstanceState.putDouble("myDouble", 1.9);
savedInstanceState.putInt("MyInt", 1);
savedInstanceState.putString("MyString", "Welcome back to Android");
// etc.
}
The Bundle is essentially a way of storing a NVP ("Name-Value Pair") map, and it will get passed in to onCreate() and also ...
Mutable vs immutable objects
... and all of the hashing became obsolete. Theorists like to harp on this point, but in practice I haven't found it to be too much of an issue.
Another aspect is the logical "reasonability" of your code. This is a hard term to define, encompassing everything from readability to flow. Generically, y...
How to set standard encoding in Visual Studio
...files comform to set rules. Note that Visual Studio does not automatically convert all your files but do its bit when you work with files in IDE (open and save).
What next
While you could have a Visual-studio-wide setup, I strongly suggest to still include an EditorConfig root to your solution ve...
What does “Content-type: application/json; charset=utf-8” really mean?
...", "UTF-8");) for me and I had to retrieve response data as draw bytes and convert it into String using UTF-8. So, it is recommended to be explicit and avoid assumption of default value.
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imp...
How do I change the formatting of numbers on an axis with ggplot?
... E.g.: (3x10^+2 -> 3x10^2) l <- gsub("e\\+","e",l) and after it: # convert 1x10^ or 1.000x10^ -> 10^ l <- gsub("\\'1[\\.0]*\\'\\%\\*\\%", "", l) to make it in format usually used in papers.
– John_West
Feb 23 '16 at 14:08
...
Does List guarantee insertion order?
...you should explicitly order the list or have your API take the appropriate Interface/class such as IOrderedEnumerable or SortedList, otherwise you should not rely on a particular implementation to behave a certain way unless it is explicitly stated unambiguously" You also have to be careful about e...
What's best SQL datatype for storing JSON string?
...is based on nvarchar) will be introduced, as well as a FOR JSON command to convert output from a query into JSON format
Update #2: in the final product, Microsoft did not include a separate JSON datatype - instead, there are a number of JSON-functions (to package up database rows into JSON, or to p...