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List of strings to one string
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Django Forms: if not valid, show form with error message
I Django forms, it can check whether the form is valid:
7 Answers
7
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What's the fastest way to do a bulk insert into Postgres?
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PostgreSQL has a guide on how to best populate a database initially, and they suggest using the COPY command for bulk loading rows. The guide has some other good tips on how to speed up the process, like removing indexes and foreign keys befor...
Javascript “Not a Constructor” Exception while creating objects
...t is not a user-defined function / valid constructor.
function x(a,b,c){}
new x(1,2,3); // produces no errors
You've probably done something like this:
function Project(a,b,c) {}
Project = {}; // or possibly Project = new Project
new Project(1,2,3); // ->...
What columns generally make good indexes?
...re I am attempting to learn about indexes, what columns are good index candidates? Specifically for an MS SQL database?
12 ...
Best way to turn an integer into a month name in c#?
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So anytime I need to turn 1 into January, I need to new up a date time with an arbitrary year and day, in order to just get January?
– DevelopingChris
Oct 20 '08 at 15:56
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What is ng-transclude?
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JSON Stringify changes time of date because of UTC
...un into the same issue. And it was resolved using the following code:
x = new Date();
let hoursDiff = x.getHours() - x.getTimezoneOffset() / 60;
let minutesDiff = (x.getHours() - x.getTimezoneOffset()) % 60;
x.setHours(hoursDiff);
x.setMinutes(minutesDiff);
...
How can I set the request header for curl?
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How do I avoid capturing self in blocks when implementing an API?
...Complete];
}
The __block keyword marks variables that can be modified inside the block (we're not doing that) but also they are not automatically retained when the block is retained (unless you are using ARC). If you do this, you must be sure that nothing else is going to try to execute the block ...