| # Download the VDI from https://cdn.amazonlinux.com/os-images/latest/ | |
| # Doc is at http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/amazon-linux-2-virtual-machine.html | |
| # Be sure you have config/meta-data and config/user-data ready as per the below | |
| # change ec2-user's password to your password | |
| $ cat config/meta-data | |
| local-hostname: amazonlinux.onprem | |
| # eth0 is the default network interface enabled in the image. You can configure |
| # Add these two gems | |
| gem 'ice_cube', '0.9.3' | |
| gem 'squeel', '1.0.16' |
| Array values in the parameter to `Gem.paths=` are deprecated. | |
| Please use a String or nil. | |
| An Array (...) was passed in from bin/rails:3:in `load' | |
| Solution | |
| ======== | |
| https://github.com/rubygems/rubygems/issues/1551 | |
| If you came to this issue by googling the error specified in the description of this issue, you should know that it has already been fixed in spring-1.6.4 and all you need to do is to update to latest spring and regenerate binstubs, like this: |
| function mergeObject(target) { | |
| for (var i = 1; i < arguments.length; i++) { | |
| var source = arguments[i]; | |
| for (var key in source) { | |
| if (source.hasOwnProperty(key)) { | |
| target[key] = source[key]; | |
| } | |
| } | |
| } | |
| return target; |
When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.
There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the
| #!/bin/bash | |
| sudo apt-get install qt5-default | |
| wget http://kcachegrind.sourceforge.net/kcachegrind-0.7.4.tar.gz | |
| tar xvf kcachegrind-0.7.4.tar.gz | |
| cd kcachegrind-0.7.4 | |
| qmake && make | |
| sudo install -m 755 qcachegrind/qcachegrind /usr/local/bin | |
| sudo install -m 644 qcachegrind/qcachegrind.desktop \ | |
| /usr/local/share/applications/ |
| #!/usr/bin/env bash | |
| # https://developers.supportbee.com/blog/setting-up-cucumber-to-run-with-Chrome-on-Linux/ | |
| # https://gist.github.com/curtismcmullan/7be1a8c1c841a9d8db2c | |
| # http://stackoverflow.com/questions/10792403/how-do-i-get-chrome-working-with-selenium-using-php-webdriver | |
| # http://stackoverflow.com/questions/26133486/how-to-specify-binary-path-for-remote-chromedriver-in-codeception | |
| # http://stackoverflow.com/questions/40262682/how-to-run-selenium-3-x-with-chrome-driver-through-terminal | |
| # http://askubuntu.com/questions/760085/how-do-you-install-google-chrome-on-ubuntu-16-04 | |
| # Versions | |
| CHROME_DRIVER_VERSION=`curl -sS chromedriver.storage.googleapis.com/LATEST_RELEASE` |
| <html> | |
| <body> | |
| <section class="left"> | |
| <article id="customers"> | |
| <h2>New Customers</h2> | |
| <table class="data"> | |
| <thead> | |
| <tr> | |
| <th>ID</th> | |
| <th>First Name</th> |
| with table_stats as ( | |
| select psut.relname, | |
| psut.n_live_tup, | |
| 1.0 * psut.idx_scan / greatest(1, psut.seq_scan + psut.idx_scan) as index_use_ratio | |
| from pg_stat_user_tables psut | |
| order by psut.n_live_tup desc | |
| ), | |
| table_io as ( | |
| select psiut.relname, | |
| sum(psiut.heap_blks_read) as table_page_read, |
| # By Steve Leung | |
| # [email protected] | |
| class ActiveRecord::Relation | |
| # temporarily hack for allowing combining scopes with OR | |
| # doesn't add the join tables so need to use .includes manually | |
| # ie. Jobship.includes(:job).or(Jobship.accepted, Jobship.declined).count | |
| def or(*scopes) | |
| clauses = *scopes.map do |relation| |