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Create array of symbols
...mber '11, but, starting from Ruby 2.0, there is a shorter way to create an array of symbols! This literal:
%i[address city state postal country]
will do exactly what you want.
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How to go to each directory and execute a command?
...upport directories with spaces in their name.
Or by assigning into bash array:
dirs=($(find . -type d))
for dir in "${dirs[@]}"; do
cd "$dir"
echo $PWD
done
Change . to your specific folder name. If you don't need to run recursively, you can use: dirs=(*) instead. The above example doesn't...
How to conditionally push an item in an observable array?
I would like to push a new item onto an observableArray , but only if the item is not already present. Is there any "find" function or recommended pattern for achieving this in KnockoutJS?
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Best way to convert IList or IEnumerable to Array
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Which version of .NET are you using? If it's .NET 3.5, I'd just call ToArray() and be done with it.
If you only have a non-generic IEnumerable, do something like this:
IEnumerable query = ...;
MyEntityType[] array = query.Cast<MyEntityType>().ToArray();
If you don't know the type withi...
Is there a literal notation for an array of symbols?
I like this literal expression for an array of strings:
2 Answers
2
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Getting the object's property name
....log(keyNames); // Outputs ["a","b","c"]
Object.keys() gives you an array of property names belonging to the input object.
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RESTful way to create multiple items in one request
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I append the errors to an array, route the user to a 419 Conflict error page (and return that error to the client), and display the array of errors. See my answer below for more details.
– Eric Fuller
Oct 24 '13 ...
PostgreSQL - max number of parameters in “IN” clause?
...llowing is a code comment from line 870:
/*
* We try to generate a ScalarArrayOpExpr from IN/NOT IN, but this is only
* possible if the inputs are all scalars (no RowExprs) and there is a
* suitable array type available. If not, we fall back to a boolean
* condition tree with multiple copies o...
how to convert from int to char*?
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In C++17, use std::to_chars as:
std::array<char, 10> str;
std::to_chars(str.data(), str.data() + str.size(), 42);
In C++11, use std::to_string as:
std::string s = std::to_string(number);
char const *pchar = s.c_str(); //use char const* as target type
A...
Android XML Percent Symbol
I have an array of strings in which the % symbol is used. Proper format for using the % is &#37; . When I have a string in that array with multiple &#37; it gives me this error.
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