All floats or non string data types must be casted to strings before concatenation This should work correctly: (notice the str cast for multiplication result) easygui.msgbox=(“You need “+ str(3.14*(float(radius)**2) * float(height)) + “gallons of water to fill this pool.”) straight from the interpreter: >>> radius = 10 >>> height = 10 >>> msg = (“You … Read more
Create an array from the two columns, the aggregate the array: select id, array_agg(array[x,y]) from the_table group by id; Note that the default text representation of arrays uses curly braces ( {..}) not square brackets ([..])
I believe you have your answer there. Concatenation is calculated beforehand the condition check. So if you call your logging framework 10K times conditionally and all of them evaluates to false, you will be concatenating 10K times with no reason. Also check this topic. And check Icaro’s answer’s comments. Take a look to StringBuilder too.
Strings are concatenated by default in the shell. value=”$variable”text”$other_variable” It’s generally considered good practice to wrap variable expansions in double quotes. You can also do this: value=”${variable}text${other_variable}” The curly braces are useful when dealing with a mixture of variable names and strings. Note that there should be no spaces around the = in an assignment.
With ES6, you can use Template strings: var username=”craig”; console.log(`hello ${username}`); ES5 and below: use the + operator var username=”craig”; var joined = ‘hello ‘ + username; String’s concat(..) var username=”craig”; var joined = ‘hello ‘.concat(username); Alternatively, use Array methods: join(..): var username=”craig”; var joined = [‘hello’, username].join(‘ ‘); Or even fancier, reduce(..) combined with … Read more
If I understood you correctly, this is what you would like to do. import pandas as pd df1 = pd.DataFrame({‘A’: [‘A0’, ‘A1’, ‘A2’, ‘A3’], ‘B’: [‘B0’, ‘B1’, ‘B2’, ‘B3’], ‘D’: [‘D0’, ‘D1’, ‘D2’, ‘D3’]}, index=[0, 2, 3, 4]) df2 = pd.DataFrame({‘A1’: [‘A4’, ‘A5’, ‘A6’, ‘A7’], ‘C’: [‘C4’, ‘C5’, ‘C6’, ‘C7’], ‘D2’: [‘D4’, ‘D5’, ‘D6’, ‘D7’]}, … Read more
There are a couple of different ways you can collapse your matrix into a vector, depending upon how you want the contents of your matrix to fill that vector. Here are two examples, one using the function reshape (after first transposing the matrix) and one using the colon syntax (:): >> M = [1 2 … Read more
Perhaps this will work? <c:forEach items=”${myParams.items}” var=”currentItem” varStatus=”stat”> <c:set var=”myVar” value=”${stat.first ? ” : myVar} ${currentItem}” /> </c:forEach>
The CONCAT function was extended in JPA 2.0 to allow passing more than 2 parameters, from section 4.6.17.2.1 (String Functions) of the specification: CONCAT(string_primary, string_primary {, string_primary}* ) In JPA 1 this was restricted to exactly two parameters.