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Using Rails serialize to save hash to database
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Exact implementation will depend on your database, but PostgreSQL now has json and jsonb columns which can natively store your hash/object data and allow you to query against the JSON with ActiveRecord!
change your migration and you're done.
class Migration0001
def change
add_column :users,...
二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...据
Format Information 存在于所有的尺寸中，用于存放一些格式化数据的。
Version Information 在 >= Version 7以上，需要预留两块3 x 6的区域存放一些版本信息。
数据码和纠错码
除了上述的那些地方，剩下的地方存放 Data Code 数...
How to sort an array based on the length of each element?
...d"];
array.sort(function(a, b){return b.length - a.length});
console.log(JSON.stringify(array, null, '\t'));
For ascending sort order: a.length - b.length
For descending sort order: b.length - a.length
ES6 solution
Attention: not all browsers can understand ES6 code!
In ES6 we can use an a...
浅谈HTML5 & CSS3的新交互特性 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的主要语言。通过这种语言，我们可以向计算机说明网页格式、内容、显示效果等等。而CSS则是专门用来控制网页显示效果的语言。这时候问题出来了，为什么我们要单独使用CSS呢，HTML不是一样可以控制Web页面的显示效果么？...
What's the difference between require and require-dev? [duplicate]
... @ScottDavidTesler this package the package you provide in your composer.json file like "require-dev": { // this package('s) }
– Rahil Wazir
Jun 25 '14 at 13:06
9
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In a javascript array, how do I get the last 5 elements, excluding the first element?
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cutOffFirstAndLastFive([1, 55, 77, 88]);
console.log(
'Tests:',
JSON.stringify(cutOffFirstAndLastFive([1, 55, 77, 88])),
JSON.stringify(cutOffFirstAndLastFive([1, 55, 77, 88, 99, 22, 33, 44])),
JSON.stringify(cutOffFirstAndLastFive([1]))
);
...
How to specify Composer install path?
... "package": {
"name": "sfGuardPlugin",
So, your composer.json should look like this:
{
"config": {
"vendor-dir": "plugins"
},
"repositories": [
{
"type": "package",
"package": {
"name": "sfGuardPlugin",
...
How to generate a Dockerfile from an image?
...g.WorkingDir}}WORKDIR {{.}}{{end}}
{{with .Config.Entrypoint}}ENTRYPOINT {{json .}}{{end}}
{{with .Config.Cmd}}CMD {{json .}}{{end}}
{{with .Config.OnBuild}}ONBUILD {{json .}}{{end}}' "$1"
I use this as part of a script to rebuild running containers as images:
https://github.com/docbill/docker-sc...
ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]
...ucene solution needs to be sharded. Also, with the advancement of HTTP and JSON as ubiquitous APIs, it means that a solution that many different systems with different languages can easily be used.
This is why I went ahead and created ElasticSearch. It has a very advanced distributed model, speaks...
How to construct a REST API that takes an array of id's for the resources
...in requests, while the service responses should be serialized using XML or JSON. Are there any particular reasons why you don't consider my approach to be REST?
– Florin Dumitrescu
Dec 28 '10 at 15:40
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