How to join a vector of strings with a delimiter prepended to each string?

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I'm looking for something like join but with the delimiter going in front of each string rather than just acting as a separator.

As a simple example, I'm looking for a less ugly version of this:

(def params [1 2 3 4])
(clojure.string/join (for [x params] (str "&param=" x)))



Calling (clojure.string/join coll) with no separator is the same as (apply str coll) which is a tiny win:

(apply str (for [x params] (str "&param=" x)))

Then you might prefer map over for here:

(apply str (map #(str "&param=" %) params))

interleave could work:

(apply str (interleave (repeat "&param=") params))

You could refactor this to separate the prefix and interleave it with the strings:

(apply str
       (interleave (repeat \&)
                   (map #(str "param=" %) params)))

You might like the look of threading:

(->> (map #(str "param=" %) params)
     (interleave (repeat \&))
     (apply str))

You could extract a function to do this more generally:

(defn prepend-join [separator & cs]
  (apply str (apply interleave (repeat separator) cs)))

(prefix-join \& (map #(str "param=" %) params))

How to implode a vector of strings into a string (the elegant way , #include <boost/algorithm/string/join.hpp> std::string joinedString std::vector <std::string> strings; const char* const delim = ", " No big deal. std:: ostream_iterator writes the delimiter after every single element, including the last. So you'd� Given a sequence of strings, such as output from Example 4-10, you want to join them together into a single, long string, perhaps with a delimiter. Solution Loop through the sequence and append each string to the output string.

and in addition: there is a handy function in clojure's core lib, namely clojure.pprint/cl-format

user> (clojure.pprint/cl-format nil "~{&param=~a~}" [1 2 3 4 5])
;;=> "&param=1&param=2&param=3&param=4&param=5"

talking about it's capabilities, it is just the top of the iceberg

4.8. Joining a Sequence of Strings - C++ Cookbook [Book], Loop through the sequence and append each string to the output string. < vector> #include <iostream> using namespace std; void join(const vector<string> & v,� Delimiting characters, specified as a character vector, a 1 -by- n cell array of character vectors, or a 1 -by- n string array. If delimiter is a character vector, then strjoin forms str by inserting delimiter between each element of C. The delimiter input can include any of these escape sequences:

Prepending an empty string to params looks pretty clean to me:

(clojure.string/join "&param=" (cons "" params))
;;=> "&param=1&param=2&param=3&param=4"

Str\join, Returns a string formed by joining the elements of the Traversable with the given $glue string. namespace HH\Lib\Str; function join( Traversable<arraykey>� I wasn't able to find the Rust equivalent for the "join" operator over a vector of Strings. I have a Vec&lt;String&gt; and I'd like to join them as a single String: let string_list = vec!["Foo".

Join strings in array - MATLAB strjoin, C can be a cell array of character vectors or a string array. example. str = strjoin( C , delimiter ) constructs str by linking each� There is another, more powerful, way to join strings together. You can go from a list to a string in Python with the join () method. The common use case here is when you have an iterable—like a list—made up of strings, and you want to combine those strings into a single string. Like.split (),.join () is a string instance method.

How can I prepend and append to each member of an array?, printf re-uses the format string until all the arguments are used up, so it provides an easy way to apply some formatting to a set of strings. quoted form "${array[*] }" adds separator ] between each pair (the first character of IFS , this is where the � The join method will return a string that is the concatenation of all the array elements. It will use the first parameter you pass as a separator - if you don't use one, it will use the default separator, which is the comma.

QStringList Class, QString, join(QLatin1String separator) const functions like append(), prepend(), insert(), replace(), removeAll(), removeAt(), removeFirst(), removeLast(), You can concatenate all the strings in a string list into a single string (with an optional � Concatenates an array of strings, using the specified separator between each member. Join(String, IEnumerable<String>) Concatenates the members of a constructed IEnumerable<T> collection of type String, using the specified separator between each member. Join(String, Object[]) Concatenates the elements of an object array, using the specified