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join list of lists in python [duplicate]
Is the a short syntax for joining a list of lists into a single list( or iterator) in python?
15 Answers
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Generate a random alphanumeric string in Cocoa
I want to call a method, pass it the length and have it generate a random alphanumeric string.
20 Answers
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How to get all count of mongoose model?
... model that data has been saved? there is a method of Model.count() , but it doesn't seem to work.
8 Answers
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How to draw a custom UIView that is just a circle - iPhone app
How would I go about drawing a custom UIView that is literally just a ball (a 2D circle)? Would I just override the drawRect method? And can someone show me the code for drawing a blue circle?
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Running a Python script from PHP
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Tested on Ubuntu Server 10.04. I hope it helps you also on Arch Linux.
In PHP use shell_exec function:
Execute command via shell and return the complete output as a string.
It returns the output from the executed command or NULL if an error
occurred o...
How do I merge two javascript objects together in ES6+?
I'm sick of tired of always having to write code like this:
6 Answers
6
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Repeat Character N Times
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These days, the repeat string method is implemented almost everywhere. (It is not in Internet Explorer.) So unless you need to support older browsers, you can simply write:
"a".repeat(10)
Before repeat, we used this hack:
Array(11).join("a") // create string with 10 a's: "aaaaaaaaaa"
(Note ...
How to access command line arguments of the caller inside a function?
I'm attempting to write a function in bash that will access the scripts command line arguments, but they are replaced with the positional arguments to the function. Is there any way for the function to access the command line arguments if they aren't passed in explicitly?
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Collections.emptyList() vs. new instance
In practice, is it better to return an empty list like this :
7 Answers
7
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Find document with array that contains a specific value
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As favouriteFoods is a simple array of strings, you can just query that field directly:
PersonModel.find({ favouriteFoods: "sushi" }, ...);
But I'd also recommend making the string array explicit in your schema:
person = {
nam...