JavaScript Arrays are a very flexible data structure and used as lists, stacks, queues, tuples (e.g. pairs), etc. Some
Creating Arrays, reading and writing elements:
rauschma
/ cheat-sheet-arrays.md
Last active
January 16, 2024 14:13
LayZeeDK
/ angular-cli-node-js-typescript-rxjs-compatiblity-matrix.csv
Last active
October 27, 2024 02:04
Angular CLI, Angular, Node.js, TypeScript, and RxJS version compatibility matrix. Officially part of the Angular documentation as of 2023-04-19 https://angular.io/guide/versions
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| Angular CLI version | Angular version | Node.js version | TypeScript version | RxJS version | |
|---|---|---|---|---|---|
| ~16.0.0 | ~16.0.0 | ^16.13.0 || ^18.10.0 | >=4.9.5 <5.1.0 | ^6.5.5 || ^7.4.0 | |
| ~15.2.0 | ~15.2.0 | ^14.20.0 || ^16.13.0 || ^18.10.0 | >=4.8.4 <5.0.0 | ^6.5.5 || ^7.4.0 | |
| ~15.1.0 | ~15.1.0 | ^14.20.0 || ^16.13.0 || ^18.10.0 | >=4.8.4 <5.0.0 | ^6.5.5 || ^7.4.0 | |
| ~15.0.5 | ~15.0.4 | ^14.20.0 || ^16.13.0 || ^18.10.0 | ~4.8.4 | ^6.5.5 || ^7.4.0 | |
| ~14.3.0 | ~14.3.0 | ^14.15.0 || ^16.10.0 | >=4.6.4 <4.9.0 | ^6.5.5 || ^7.4.0 | |
| ~14.2.0 | ~14.2.0 | ^14.15.0 || ^16.10.0 | >=4.6.4 <4.9.0 | ^6.5.5 || ^7.4.0 | |
| ~14.1.3 | ~14.1.3 | ^14.15.0 || ^16.10.0 | >=4.6.4 <4.8.0 | ^6.5.5 || ^7.4.0 | |
| ~14.0.7 | ~14.0.7 | ^14.15.0 || ^16.10.0 | >=4.6.4 <4.8.0 | ^6.5.5 || ^7.4.0 | |
| ~13.3.0 | ~13.3.0 | ^12.20.2 || ^14.15.0 || ^16.10.0 | >=4.4.4 <4.7.0 | ^6.5.5 || ^7.4.0 |
eladnava
/ mongodb-s3-backup.sh
Last active
September 13, 2024 11:42
Automatically backup a MongoDB database to S3 using mongodump, tar, and awscli (Ubuntu 14.04 LTS)
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| #!/bin/sh | |
| # Make sure to: | |
| # 1) Name this file `backup.sh` and place it in /home/ubuntu | |
| # 2) Run sudo apt-get install awscli to install the AWSCLI | |
| # 3) Run aws configure (enter s3-authorized IAM user and specify region) | |
| # 4) Fill in DB host + name | |
| # 5) Create S3 bucket for the backups and fill it in below (set a lifecycle rule to expire files older than X days in the bucket) | |
| # 6) Run chmod +x backup.sh | |
| # 7) Test it out via ./backup.sh |
webteckie
/ keystone_roles_permissions.md
Last active
November 21, 2021 11:35
Keystone Roles and Permissions
The following documents the user permission support in keystone based on the support being added via PR #2111. Permissions are based on roles. If a user has a role and the list also specifies that role for any of its CRUD operations then it is permissive for the user to perform whichever CRUD operation matches the role. All users must define, at least, one role. The following are guidelines for adding role/permission support to your application:
vijaravind
/ merge-ros-pointcloud.cpp
Last active
April 22, 2022 11:19
Sample code to concatenate ROS PointCloud (not PointCloud2) data
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| /** | |
| * \brief Function to merge the vectors of geometry_msgs::Point32 | |
| * \param vin : input vector | |
| * \param vout : output vector (output value) | |
| */ | |
| void merge_point32_vector(const std::vector<geometry_msgs::Point32>& vin, std::vector<geometry_msgs::Point32>& vout) | |
| { | |
| vout.reserve(vout.size() + vin.size()); | |
| vout.insert(vout.end(), vin.begin(), vin.end()); |
virgilvox
/ mqtt_meshblu_send_receive.ino
Created
April 9, 2015 18:51
Use MQTT to send/recieve JSON using an Arduino with Ethernet!
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| #include <SPI.h> | |
| #include <Ethernet.h> | |
| #include <ArduinoJson.h> | |
| #include <PubSubClient.h> | |
| // Update these with values suitable for your network. | |
| IPAddress ip(192, 168, 0, 177); |
##Sass Functions Cheat Sheet
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| uint16_t crc16(char* pData, int length) | |
| { | |
| uint8_t i; | |
| uint16_t wCrc = 0xffff; | |
| while (length--) { | |
| wCrc ^= *(unsigned char *)pData++ << 8; | |
| for (i=0; i < 8; i++) | |
| wCrc = wCrc & 0x8000 ? (wCrc << 1) ^ 0x1021 : wCrc << 1; | |
| } | |
| return wCrc & 0xffff; |
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| myApp.config(['$httpProvider', function($httpProvider) { | |
| $httpProvider.defaults.useXDomain = true; | |
| delete $httpProvider.defaults.headers.common['X-Requested-With']; | |
| } | |
| ]); |
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