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How to parse a CSV file in Bash?
... with some lines, so this the solution.
while IFS=, read -ra line
do
test $i -eq 1 && ((i=i+1)) && continue
for col_val in ${line[@]}
do
echo -n "$col_val|"
done
echo
done < "$csvFile"
...
CoffeeScript, When to use fat arrow (=>) over arrow (->) and vice versa
...xample for unstanding the fat arrow
not works: (@canvas undefined)
class Test
constructor: ->
@canvas = document.createElement 'canvas'
window.addEventListener 'resize', ->
@canvas.width = window.innerWidth
@canvas.height = window.innerHeight
works: (@canvas defined)
...
JavaScript error (Uncaught SyntaxError: Unexpected end of input)
...y returned ajax calls, when trying to parse an empty JSON.
To solve this test if the returned data is empty
$.ajax({
url: url,
type: "get",
dataType: "json",
success: function (response) {
if(response.data.length == 0){
// EMPTY
}else{
var...
SetUnhandledExceptionFilter and the C/C++ Runtime Library - C/C++ - 清...
...(JIT) debugger if such a debugger is installed on the system.
In order to test the code, we will simulate a null pointer invalid access like this:
int main()
{
::SetUnhandledExceptionFilter(OurCrashHandler);
std::cout << "Normal null pointer crash" << std::endl;
char *p = 0;
...
Why do people use Heroku when AWS is present? What distinguishes Heroku from AWS? [closed]
...e Management System(Mysql, Redis etc)
Configure production server
Tool for testing and deployment
Monitoring App
High Availability
Load Blancing/ Http Routing
Service Backup Policies
Team Collaboration
Rebuild Production
If you have small scale business, PaaS will be best option for you:
Pay ...
Caveats of select/poll vs. epoll reactors in Twisted
...
In tests at my company, one issue with epoll() came up, thus a single cost compared to select.
When attempting to read from the network with a timeout, creating an epoll_fd ( instead of a FD_SET ), and adding the fd to the epol...
When to use which design pattern? [closed]
... Design patterns can speed up the development process by providing tested, proven development paradigms. Effective software design requires considering issues that may not become visible until later in the implementation. Reusing design patterns helps to prevent subtle issues that can cause ...
How can I implement an Access Control List in my Web MVC application?
...e the ACL only with what it needs, which will also make it a bit more unit-testing friendly:
$command = array( get_class($this->target), $method );
/* -- snip -- */
$this->acl->isAllowed( $this->target->getPermissions(), $command )
Couple videos that might help you to come up with...
var functionName = function() {} vs function functionName() {}
...rwritten without any problems just like a variable value, e.g.:
function test () {}
test = null;
Another obvious difference between your two examples is that the first function doesn't have a name, but the second has it, which can be really useful when debugging (i.e. inspecting a call stack).
...
How can I access and process nested objects, arrays or JSON?
...n where the object comes from (and what you want to do), you might have to test in each iteration whether the property is really a property of the object, or it is an inherited property. You can do this with Object#hasOwnProperty [MDN].
As alternative to for...in with hasOwnProperty, you can use Ob...