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Check if a Postgres JSON array contains a string
...ect info->>'name' from rabbits where exists (
d(# select 1 from json_array_elements(info->'food') as food
d(# where food::text = '"carrots"'
d(# );
Execution time: 3084.927 ms
d=# -- Postgres 9.4+ solution
d=# explain analyze select info->'name' from rabbits where (info->'food')::...
Print array to a file
I would like to print an array to a file.
12 Answers
12
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When should I use a struct rather than a class in C#?
...fill: 889ms
Capacity: number of elements available before the internal array must be resized.
MemSize: determined by serializing the dictionary into a MemoryStream and getting a byte length (accurate enough for our purposes).
Completed Resize: the time it takes to resize the internal arr...
PHP prepend associative array with literal keys?
Is it possible to prepend an associative array with literal key=>value pairs? I know that array_unshift() works with numerical keys, but I'm hoping for something that will work with literal keys.
...
Pass Variables by Reference in Javascript
...dbye" instead of "hello world"
You can iterate over the properties of an array with a numeric index and modify each cell of the array, if you want.
var arr = [1, 2, 3];
for (var i = 0; i < arr.length; i++) {
arr[i] = arr[i] + 1;
}
It's important to note that "pass-by-reference" is a v...
How can I convert the “arguments” object to an array in JavaScript?
The arguments object in JavaScript is an odd wart—it acts just like an array in most situations, but it's not actually an array object. Since it's really something else entirely , it doesn't have the useful functions from Array.prototype like forEach , sort , filter , and map .
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Exit Shell Script Based on Process Exit Code
...ipeline actually works, returning 0).
The bash shell actually provides an array which can assist in that case, that being PIPESTATUS. This array has one element for each of the pipeline components, that you can access individually like ${PIPESTATUS[0]}:
pax> false | true ; echo ${PIPESTATUS[0]}...
How to declare and add items to an array in Python?
I'm trying to add items to an array in python.
7 Answers
7
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Shuffle an array with python, randomize array item order with python
What's the easiest way to shuffle an array with python?
11 Answers
11
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Determine whether JSON is a JSONObject or JSONArray
I am going to receive either a JSON Object or Array from server, but I have no idea which it will be. I need to work with the JSON, but to do so, I need to know if it is an Object or an Array.
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