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How to define hash tables in Bash?
... "$animals_moo"
cow
Bring them together:
# Set a value:
declare "array_$index=$value"
# Get a value:
arrayGet() {
local array=$1 index=$2
local i="${array}_$index"
printf '%s' "${!i}"
}
Let's use it:
$ sound=moo
$ animal=cow
$ declare "animals_$sound=$animal"
$ arrayGet animals "...
Why does flowing off the end of a non-void function without returning a value not produce a compiler
...
C99 and C++ standards don't require functions to return a value. The missing return statement in a value-returning function will be defined (to return 0) only in the main function.
The rationale includes that checking if every code path returns a value i...
How to rsync only a specific list of files?
... answered Jan 22 '16 at 11:01
Waqas KhanWaqas Khan
12911 silver badge33 bronze badges
...
What are the differences between Deferred, Promise and Future in JavaScript?
...
In light of apparent dislike for how I've attempted to answer the OP's question. The literal answer is, a promise is something shared w/ other objects, while a deferred should be kept private. Primarily, a deferred (which generally extends Promise) can resolve itself, while a promise might not b...
What is the difference between save and export in Docker?
...operating system.
It will pack the layers and metadata of all the chain required to build the image. You can then load this "saved" images chain into another docker instance and create containers from these images.
export will fetch the whole container : like a snapshot of a regular VM. Saves the O...
Is there StartsWith or Contains in t sql with variables?
...
StartsWith
a) left(@edition, 15) = 'Express Edition'
b) charindex('Express Edition', @edition) = 1
Contains
charindex('Express Edition', @edition) >= 1
Examples
left function
set @isExpress = case when left(@edition, 15) = 'Express Edition' then 1 else 0 end
iif function (...
MongoDB Many-to-Many Association
... Read, Update, Delete, List Users, Add User, Remove User, Clear All Users, Index of User or similar to support "Is User In Role" (operations like a container + its own metadata).
User - Create, Read, Update, Delete (CRUD operations like a free-standing entity)
This can be modeled as the following ...
In Flux architecture, how do you manage Store lifecycle?
...D_ERROR).
// Paginated Stores keep their data like this
[7, 10, 5, ...]
Indexed List Stores are like List Stores but they define one-to-many relationship. For example, “user's subscribers”, “repository's stargazers”, “user's repositories”. They also handle pagination.
They also norma...
How to get label of select option with jQuery?
...
$("select#selectbox option:eq(0)").text()
The 0 index in the "option:eq(0)" can be exchanged for whichever indexed option you'd like to retrieve.
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Difference between . and : in Lua
...y the local variable? Because, as many have pointed out, obj:method() only indexes _ENV once to get obj. This normally just important when considering speed, but consider this situation:
local tab do
local obj_local = { method = function(self, n) print n end }
tab = setmetatable({}, {__index = ...