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Using Rails serialize to save hash to database
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add_column :users, :multi_wrong, :text
end
Then Rails will properly convert it into YAML for you (and perform proper serialization). Strings fields are limited in size and will only hold especially-small values.
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How do I check if a given string is a legal/valid file name under Windows?
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2nd piece of code doesn't compile. "Cannot convert from char[] to string
– Paul Hunt
Apr 25 '14 at 12:03
1
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C# nullable string error
...nullable".
Nullable<T> and the ? suffix are for value types such as Int32, Double, DateTime, etc.
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Example of UUID generation using Boost in C++
...important for instances in my program to have unique identifiers. I looked into Boost UUID , but I can't manage to generate the UUID because I don't understand which class and method to use.
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How to initialize HashSet values by construction?
...;
Again, this is not time efficient since you are constructing an array, converting to a list and using that list to create a set.
When initializing static final sets I usually write it like this:
public static final String[] SET_VALUES = new String[] { "a", "b" };
public static final Set<Str...
HTML select form with option to enter custom value
...ext, to a GET of the same page as a query string. Does anyone know how to convert the action to a POST, so I can grab the value in a php file and do something with it there?
– Han
Sep 29 '19 at 8:17
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In C#, how can I create a TextReader object from a string (without writing to disk)
...es a TextReader object, and all I have is a string. What's the best way to convert a string into a TextReader object on the fly?
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What is the difference between pluck and collect in Rails?
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Yes. According to Rails guides, pluck directly converts a database result into an array, without constructing ActiveRecord objects. This means better performance for a large or often-running query.
In addition to @apneadiving's answer, pluck can take both single and mult...
iterating over each character of a String in ruby 1.8.6 (each_char)
... in an ASCII string:
"ABCDEFG".each_byte do |i|
puts i.chr # Fixnum#chr converts any number to the ASCII char it represents
end
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Extracting substrings in Go
...-sequence.
Here's a UTF-8-aware version:
func substr(input string, start int, length int) string {
asRunes := []rune(input)
if start >= len(asRunes) {
return ""
}
if start+length > len(asRunes) {
length = len(asRunes) - start
}
return string(asRunes...