Here we have a simple class to be tested that returns a Promise based on the results of an external ResponseProcessor that takes time to execute.
For simplicty we'll assume that the processResponse method won't ever fail.
import {processResponse} from '../utils/response_processor';
const ping =...
import std.stdio;
void main()
{
writeln("Hello World!");
}
Multiple imports can either be specified in the same line, separated with a comma or in a new line.
import std.stdio, std.math;
import std.datetime;
void main()
{
writeln("2^4: ", pow(2, 4));
writ...
Selective imports can help to cleanup the namespace and speed-up the compile-time even more, because the compiler only needs to parse the specific, selected functions.
import std.stdio: writeln;
void main()
{
writeln("Hello world");
}
You can also import symbols in any scope, the import will only be looked up when the scope is needed (i.e. compiled) and the imported names will only be exposed in the imported scope. Most commonly the scope for local imports are functions, structs and classes.
void main()
{
import std.stdio:...
A local name for an import can be given, through which all references to the module's symbols must be qualified with:
import io = std.stdio;
void main()
{
io.writeln("Hello world");
std.stdio.writeln("hello!"); // error, std is undefined
writeln("hello!&qu...
Modules have a one-to-one correspondence with source files. The module name is, by default, the file name with the path and extension stripped off, and can be set explicitly with the module declaration.
The ModuleDeclaration sets the name of the module and what package it belongs to. If absent, the...
You can move a container instead of copying it:
void print(const std::vector<int>& vec) {
for (auto&& val : vec) {
std::cout << val << ", ";
}
std::cout << std::endl;
}
int main() {
// initialize vec1 with 1, 2, 3, 4 and...
Suppose, that we have three users :
The Administrator of the database > admin
The application with a full access for her data > read_write
The read only access > read_only
--ACCESS DB
REVOKE CONNECT ON DATABASE nova FROM PUBLIC;
GRANT CONNECT ON DATABASE nova TO user;
With th...
Converting a time to a string is a pretty common thing to do in Ruby. strftime is the method one would use to convert time to a string.
Here are some examples:
Time.now.strftime("%Y-%m-d %H:%M:S") #=> "2016-07-27 08:45:42"
This can be simplified even further
Time.now.str...
A simple cursor syntax, operating on a few example test rows:
/* Prepare test data */
DECLARE @test_table TABLE
(
Id INT,
Val VARCHAR(100)
);
INSERT INTO @test_table(Id, Val)
VALUES
(1, 'Foo'),
(2, 'Bar'),
(3, 'Baz');
/* Test data prepared */
/* Iterator variabl...
COPY is PostgreSQL's bulk-insert mechanism. It's a convenient way to transfer data between files and tables, but it's also far faster than INSERT when adding more than a few thousand rows at a time.
Let's begin by creating sample data file.
cat > samplet_data.csv
1,Yogesh
2,Raunak
3,Varun
...
Media queries allow one to apply CSS rules based on the type of device / media (e.g. screen, print or handheld) called media type, additional aspects of the device are described with media features such as the availability of color or viewport dimensions.
General Structure of a Media Query
@media ...
By default, the caret ^ metacharacter matches the position before the first
character in the string.
Given the string "charsequence" applied
against the following patterns: /^char/ & /^sequence/, the engine will try to match as follows:
/^char/
^ - charsequence
c - charsequ...
Proper indentation gives not only the aesthetic look but also increases the readability of the code.
For example, consider the following code:
%no need to understand the code, just give it a look
n = 2;
bf = false;
while n>1
for ii = 1:n
for jj = 1:n
if ii+jj>30
bf = true;
break
end...
Assertions are used not to perform testing of input parameters, but to verify that program flow is corect -- i.e., that you can make certain assumptions about your code at a certain point in time. In other words: a test done with Debug.Assert should always assume that the value tested is true.
Debu...
For multiple quotechars use regex in place of sep:
df = pd.read_csv(log_file,
sep=r'\s(?=(?:[^"]*"[^"]*")*[^"]*$)(?![^\[]*\])',
engine='python',
usecols=[0, 3, 4, 5, 6, 7, 8],
names=['ip', 'time', 'request', 'statu...
