delete all line match pattern
:g/pattern/d
delete all lines not match pattern
:g!/pattern/d
:v/pattern/d
VIM 中强大的 g 命令
copy all match lines to the end of file
:g/pattern/t$
move all match lines to the end of file
:g/pattern/m$
copy all lines matching pattern to register ‘a’
qaq:g/pattern/y A
composer 打不开 packagist.phpcomposer,可以尝试换 laravel 的
composer config -g repo.packagist composer https://packagist.laravel-china.org
or
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
安装 repo 管理器 crm:
composer global require slince/composer-registry-manager
用法:
composer repo:ls composer repo:use aliyun
json_encode ( mixed $value [, int $options = 0 [, int $depth = 512 ]] ) : string
返回字符串,包含了 value 值 JSON 形式的表示。
例子: 1,'b'=>2,'c'=>3,'d'=>4,'e'=>5); echo json_encode($arr); ?>
输出:
{"a":1,"b":2,"c":3,"d":4,"e":5}
JSON 数组删除
var test = [{ "a": "1", "b": "2" }, { "a": "3", "b": "4" }, { "a": "5", "b": "6" }];
test.length //输出为 3
test.splice(1, 1);
test.length //输出为 2