Peter Naur's classic 1985 essay "Programming as Theory Building" argues that a program is not its source code. A program is a shared mental construct (he uses the word theory) that lives in the minds of the people who work on it. If you lose the people, you lose the program. The code is merely a written representation of the program, and it's lossy, so you can't reconstruct
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import 'dart:math'; | |
import 'package:flutter/material.dart'; | |
import 'package:flutter/rendering.dart'; | |
void main() { | |
runApp(MyApp()); | |
} | |
class MyApp extends StatelessWidget { | |
@override |
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package io.license.core.validation | |
import javax.validation.Constraint | |
import javax.validation.ConstraintValidator | |
import javax.validation.ConstraintValidatorContext | |
import javax.validation.Payload | |
import kotlin.reflect.KClass | |
@Target(AnnotationTarget.FIELD) |
If your master.key has been compromised, you might want to regenerate it.
No key regeneration feature at the moment. We have to do it manually.
- Copy content of original credentials
rails credentials:show
somewhere temporarily. - Remove
config/master.key
andconfig/credentials.yml.enc
- Run
EDITOR=vim rails credentials:edit
in the terminal: This command will create a newmaster.key
andcredentials.yml.enc
if they do not exist. - Paste the original credentials you copied (step 1) in the new credentials file (and save + quit vim)
- Add and Commit the file
config/credentials.yml.enc
This is not an exhaustive list of all interfaces in Go's standard library.
I only list those I think are important.
Interfaces defined in frequently used packages (like io
, fmt
) are included.
Interfaces that have significant importance are also included.
All of the following information is based on go version go1.8.3 darwin/amd64
.
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# ########################################################## # | |
# Makefile for Golang Project | |
# Includes cross-compiling, installation, cleanup | |
# ########################################################## # | |
# Check for required command tools to build or stop immediately | |
EXECUTABLES = git go find pwd | |
K := $(foreach exec,$(EXECUTABLES),\ | |
$(if $(shell which $(exec)),some string,$(error "No $(exec) in PATH))) |
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package main | |
import ( | |
"bytes" | |
"crypto/aes" | |
"crypto/cipher" | |
"fmt" | |
) | |
func main() { |
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package main | |
import ( | |
"fmt" | |
"os" | |
"os/exec" | |
"syscall" | |
) | |
func main() { |
The standard names for indexes in PostgreSQL are:
{tablename}_{columnname(s)}_{suffix}
where the suffix is one of the following:
pkey
for a Primary Key constraint;key
for a Unique constraint;excl
for an Exclusion constraint;idx
for any other kind of index;
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