Tutorial by Examples: concat

class User { String name int age } def users = [ new User(name: "Bob", age: 20), new User(name: "Tom", age: 50), new User(name: "Bill", age: 45) ] def null_value = users.find { it.age > 100 } // no over-100 found. Null null_value?.name?....

Merges two collections (without removing duplicates) List<int> foo = new List<int> { 1, 2, 3 }; List<int> bar = new List<int> { 3, 4, 5 }; // Through Enumerable static class var result = Enumerable.Concat(foo, bar).ToList(); // 1,2,3,3,4,5 // Through extension method...

To concatenate the value of two or more variables into a single string and print it as the output, we need to make use of interpolation. The following Less code, #demo:after { @var1: Hello; @var2: World!!!; content: "@{var1} @{var2}"; } when compiled would set "Hello Wo...

It is well known that you cannot use the same file for input and ouput in the same command. For instance, $ cat header.txt body.txt >body.txt doesn’t do what you want. By the time cat reads body.txt, it has already been truncated by the redirection and it is empty. The final result will be th...

You want to combine arrays into one. For example, you have fruits = ['Broccoli', 'Carrots'] spices = ['Thyme', 'Cinnamon'] and you want to combine them into ingredients = ['Broccoli', 'Carrots', 'Thyme', 'Cinnamon'] Method 1 - using .concat ingredients = fruits.concat spices Method 2 -...

VBA supports 2 different concatenation operators, + and & and both perform the exact same function when used with String types - the right-hand String is appended to the end of the left-hand String. If the & operator is used with a variable type other than a String, it is implicitly cast to...

Using variables in a string You can concatenate strings using variables inside a double-quoted string. This does not work with properties. $string1 = "Power" $string2 = "Shell" "Greetings from $string1$string2" Using the + operator You can also join strings usin...

Merging key names are same pd.merge(df1, df2, on='key') Merging key names are different pd.merge(df1, df2, left_on='l_key', right_on='r_key') Different types of joining pd.merge(df1, df2, on='key', how='left') Merging on multiple keys pd.merge(df1, df2, on=['key1', 'key2']) Treatment...

You can use concatenation to join strings "end to end" while outputting them (with echo or print for example). You can concatenate variables using a . (period/dot). // String variable $name = 'Joel'; // Concatenate multiple strings (3 in this example) into one and echo it once done. ...

Files compressed by gzip can be directly concatenated into larger gzipped files. cat file1.gz file2.gz file3.gz > combined.gz This is a property of gzip that is less efficient than concatenating the input files and gzipping the result: cat file1 file2 file3 | gzip > combined.gz A compl...

group_concat is used to concatenate non-null values in a group. The maximum length of the resulting string can be set using the group_concat_max_len option: SET [GLOBAL | SESSION] group_concat_max_len = val; Setting the GLOBAL variable will ensure a permanent change, whereas setting the SESSION ...

It is often useful to build matrices out of smaller matrices. Horizontal Concatenation Matrices (and vectors, which are treated as column vectors) can be horizontally concatenated using the hcat function. julia> hcat([1 2; 3 4], [5 6 7; 8 9 10], [11, 12]) 2×6 Array{Int64,2}: 1 2 5 6 7 ...

var gulp = require('gulp'); // include plug-ins var uglify = require('gulp-uglify'), concat = require('gulp-concat'); // Minified file gulp.task('packjsMin', function() { return gulp.src('node_modules/angular/*.js') .pipe(concat('script.js')) .pipe(uglify()) .p...

SELECT 3 * NULL + 5, 'Hello ' || NULL || 'world' from DUAL; 3*NULL+5'HELLO'||NULL||'WORLD'(null)Hello world

The example builds a string from the name of the parent record, the name of this record, and the memo of this record. {createdfrom} || ' ' || {name} || ' ' || {memo}

Using the + operator you can easily concatenate two or more strings. DEFINE VARIABLE cString AS CHARACTER NO-UNDO. cString = "HELLO". cString = cString + " " + "GOODBYE". DISPLAY cString FORMAT "X(20)".

This is the typical approach for novice developers building SQL action queries. They are vulnerable to the Bobby Tables type SQL Injection attacks. Dim strSQL As String strSQL = "INSERT INTO Employees chrFirstName, chrLastName, chrPhone " _ & "VALUES ('" & M...

Two loops are concatenated if it’s possible to reach one after exiting the other on same path from entrance to exit. Sometimes these two loops are independent to each other. In those cases we can apply the design techniques specified as part of single loop testing. But if the iteration values in on...

$ provides an easy and a concise method to concatenate multiple strings. var str1 = "text1"; var str2 = " "; var str3 = "text3"; string result2 = $"{str1}{str2}{str3}"; //"text1 text3"