大约有 49,000 项符合查询结果（耗时：0.0445秒） [XML]
find() with nil when there are no records
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Yes, just do:
Challenge.find_by_id(10)
For Rails 4 and 5:
Challenge.find_by(id: 10)
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How to make lists contain only distinct element in Python? [duplicate]
...t(set(my_list))
One disadvantage with this is that it won't preserve the order. You may also want to consider if a set would be a better data structure to use in the first place, instead of a list.
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Tool to Unminify / Decompress JavaScript [closed]
Are there any command line scripts and/or online tools that can reverse the effects of minification similar to how Tidy can clean up horrific HTML?
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Is there any way to git checkout previous branch?
I sort of want the equivalent of cd - for git. If I am in branch master and I checkout foo , I would love to be able to type something like git checkout - to go back to master , and be able to type it again to return to foo .
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Import SQL dump into PostgreSQL database
...sql databasename < data_base_dump
That's the command you are looking for.
Beware: databasename must be created before importing.
Have a look at the PostgreSQL Docs Chapter 23. Backup and Restore.
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Getting all file names from a folder using C# [duplicate]
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DirectoryInfo d = new DirectoryInfo(@"D:\Test");//Assuming Test is your Folder
FileInfo[] Files = d.GetFiles("*.txt"); //Getting Text files
string str = "";
foreach(FileInfo file in Files )
{
str = str + ", " + file.Name;
}
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How to search contents of multiple pdf files?
How could I search the contents of PDF files in a directory/subdirectory? I am looking for some command line tools. It seems that grep can't search PDF files.
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How to check what version of jQuery is loaded?
...k currently loaded jquery version: jQuery.fn.jquery and jQuery().jquery (shorthands: $.fn.jquery $().jquery). I wrote about it in details with links to jquery source code if you'd like to dig deeper.
– Uzbekjon
Aug 16 '13 at 9:40
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Pass a PHP array to a JavaScript function [duplicate]
...s to put across JSON.parse() as one safe way to parse from string. Thanks for pointing, I will edit my post.
– UltraInstinct
May 5 '12 at 17:41
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jQuery UI DatePicker - Change Date Format
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Here's one specific for your code:
var date = $('#datepicker').datepicker({ dateFormat: 'dd-mm-yy' }).val();
More general info available here:
http://api.jqueryui.com/datepicker/#option-dateFormat
http://api.jqueryui.com/datepicker/#utility-...