Tutorial by Examples: o

In Prolog, custom operators can be defined using op/3: op(+Precedence, +Type, :Operator) Declares Operator to be an operator of a Type with a Precedence. Operator can also be a list of names in which case all elements of the list are declared to be identical operators. Precedence is an in...

FlowPane lays out nodes in rows or columns based on the available horizontal or vertical space available. It wraps nodes to the next line when the horizontal space is less than the total of all the nodes' widths; it wraps nodes to the next column when the vertical space is less than the total of all...

Introduce environment variable VAGRANT_DEFAULT_PROVIDER export VAGRANT_DEFAULT_PROVIDER=vmware_fusion

Vagrant.configure("2") do |config| # ... other config up here config.vm.provider "vmware_fusion" end

vagrant up --provider hyperv

vagrant up --provider docker

vagrant up --provider vmware_fusion

vagrant up --provider vmware_workstation

vagrant up --provider virtualbox VirtualBox is the default provider for a vanilla Vagrant setup.

Instead of the usual loosely typed: @Html.ActionLink("Log in", "UserController", "LogIn") You can now make action links strongly typed: @Html.ActionLink("Log in", @typeof(UserController), @nameof(UserController.LogIn)) Now if you want to refactor your ...

vagrant snapshot save mysnapshot

#!/bin/bash NO_SNAPSHOTS="No snapshots have been taken yet" SNAPSHOT_OUTPUT=$(vagrant snapshot list | grep "${NO_SNAPSHOTS}") if [ -z "${SNAPSHOT_OUTPUT}" ]; then echo "Found some snapshots, going to remove them" for SNAPSHOT in $(vagrant snap...

vagrant snapshot restore mysnapshot

vagrant snapshot list

vagrant snapshot restore --no-provision mysnapshot

vagrant snapshot delete mysnapshot

Versions Release Date VersionRelease Date8.2.4December 07, 20167.53December 07, 20166.38 (unsupported)February 24, 20165.23 (unsupported)August 11, 2010 Entity types In earlier versions of Drupal, the field system was only used on content types. Now, thanks to the Entity API, we can add fields...

Make sure you have ruby installed before installing rubygems, and then: Installing RubyGems Using apt-get on Ubuntu sudo apt-get install rubygems Installing RubyGems Using yum sudo yum install rubygems Manual Installation Method wget https://rubygems.org/rubygems/rubygems-2.6.6.tgz tar xv...

When a standard library function fails, it often sets errno to the appropriate error code. The C standard requires at least 3 values for errno be set: ValueMeaningEDOMDomain errorERANGERange errorEILSEQIllegal multi-byte character sequence

If perror is not flexible enough, you may obtain a user-readable error description by calling strerror from <string.h>. int main(int argc, char *argv[]) { FILE *fout; int last_error = 0; if ((fout = fopen(argv[1], "w")) == NULL) { last_error = errno; ...