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Most efficient way to prepend a value to an array
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With ES6, you can now use the spread operator to create a new array with your new elements inserted before the original elements.
// Prepend a single item.
const a = [1, 2, 3];
console.log([0, ...a]);
// Prepend an array.
co...
Best way to create a simple python web service [closed]
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Ah yes, web.py seems great. As of now, the Web site <webpy.org> says: 500 - Internal Server Error Otherwise, our code does not work for me: ... app = web.application(urls, globals()) AttributeError: 'module' object has no attribute 'application'
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How to remove spaces from a string using JavaScript?
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Interestingly, the split-join method is now the fastest for me on Firefox 73, followed by regexp1a at 53% slower.
– hackel
Jan 28 at 5:03
ad...
SPA best practices for authentication and session management
...in JavaScript.
This is the most RESTful solution. The server requires no knowledge of state whatsoever and authenticates every individual interaction with the user. Some REST enthusiasts (mostly strawmen) insist that maintaining any sort of state is heresy and will froth at the mouth if you think o...
quick random row selection in Postgres
...e optimal solution if you want only one row selected, because you need to know the COUNT of the table to calculate the exact percentage.
To avoid a slow COUNT and use fast TABLESAMPLE for tables from 1 row to billions of rows, you can do:
SELECT * FROM my_table TABLESAMPLE SYSTEM(0.000001) LIMI...
IntelliJ not recognizing a particular file correctly, instead its stuck as a text file
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/**
* Created by Alex Leporoni on ${DATE}.
*/
This is solved my issue, now I can create classes again :)
I hope that this article can help others that have the same problems to creat classes on IntelliJIdea... hugs to all.
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Javascript reduce() on Object
... That's Array.prototype.values() that you linked to - edited now
– Jonathan Wood
Sep 19 '17 at 14:11
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Difference between null and empty (“”) Java String
... a method to execute if it was), but i never understood why it worked, but now i see what it was saying, i was checking for whether MediaPlayer had been instantiated or not, by using null... e.g if (mp==null){do something}.
– Azurespot
May 18 '14 at 3:05
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Cocoa Core Data efficient way to count entities
...ke a count over an Entity-Type (like SQL can do with SELECT count(1) ...). Now I just solved this task with selecting all with NSFetchedResultsController and getting the count of the NSArray ! I am sure this is not the best way...
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npm ERR cb() never called
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IMPORTANT! The solution below is now regarded as unstable, and you should use Node Version Management instead: Node Version Manager on Github. David Walsh also has a good introduction to NVM. NVM works beautifully and I've been using it to manage legacy Word...