mediter

rails db:rollback STEP=1

# Is a way to do this, if the migration you want to rollback is the last one applied. You can substitute 1 for however many migrations you want to go back.

# For example:

rails db:rollback STEP=5
# Will also rollback all the migration that happened later (4, 3, 2 and also 1).

# In order to rollback a specific migration use:

mediter

for-loop with echo

for model in "artists" "galleries" "paintings"
do
    mkdir -p $(echo views/api/v1/$model)
    for verb in "index" "show"
    do
        touch $(echo views/api/v1/$model/$verb.json.jbuilder)
    done

mediter

# you can call #sum iterator on it:

numbers = [1, 2, 3, 4, 5]

numbers.sum
# => 15


# N.B: In Ruby versions < 2.4, sum didn't exist. The idiomatic way to get the same result was with #reduce:

mediter

register sidebar in functions.php
registering a sidebar is just defining a container

if( function_exists('register_sidebar') ) {
      register_sidebar(array(
      'name' => 'spage',
      'before_widget' => '',
      'after_widget' => '',
      'before_title' => '<h3>',
      'after_title' => '</h3>'

mediter

<ul>
<?php
    $args=array(
        'cat' => 1,   // 分类ID
        'posts_per_page' => 10, // 显示篇数
    );
    query_posts($args);
    if(have_posts()) : while (have_posts()) : the_post();
?>

mediter

// To write a pluggable function, you simply enclose it in a conditional tag to check if a function with that name has already been run:
<?php
if ( ! function_exists ( 'my_function' ) ) {
    function my_function() {
        // Contents of your function here.
    }
}
?>

Then when you come to write a function in your child theme which you want to override the one in the parent theme, you just give it the same name as the one in the parent theme:

mediter

+__rvm_make:0> make -j 1
	CC = gcc
	LD = ld
	LDSHARED = gcc -dynamiclib
	CFLAGS = -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wshorten-64-to-32 -Wimplicit-function-declaration -Wdivision-by-zero -Wdeprecated-declarations -Wextra-tokens   -fno-common -pipe 
	XCFLAGS = -D_FORTIFY_SOURCE=2 -fstack-protector -fno-strict-overflow -fvisibility=hidden -DRUBY_EXPORT
	CPPFLAGS = -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -I. -I.ext/include/x86_64-darwin17 -I./include -I.
	DLDFLAGS = -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress -L/usr/local/opt/libyaml/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/libksba/lib -L/usr/local/opt/openssl/lib -install_name /Users/jun/.rvm/rubies/

mediter

https://stackoverflow.com/a/30404532

As of Swift 4 (Xcode 9), the Swift standard library provides methods to convert between Swift string ranges (Range<String.Index>) and NSString ranges (NSRange). Example:

let str = "a👿b🇩🇪c"
let r1 = str.range(of: "🇩🇪")!

// String range to NSRange:
let n1 = NSRange(r1, in: str)
print((str as NSString).substring(with: n1)) // 🇩🇪

mediter

Swift 3 (Xcode 8)
```swift
func matches(for regex: String, in text: String) -> [String] {

    do {
        let regex = try NSRegularExpression(pattern: regex)
        let nsString = text as NSString
        let results = regex.matches(in: text, range: NSRange(location: 0, length: nsString.length))
        return results.map { nsString.substring(with: $0.range)}
    } catch let error {

mediter

add_filter( 'get_the_archive_title', function ($title) {

    if ( is_category() ) {

            $title = single_cat_title( '', false );

        } elseif ( is_tag() ) {

            $title = single_tag_title( '', false );