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How to check if array element exists or not in javascript?
... you can use some function:
// search object
var element = { item:'book', title:'javasrcipt'};
[{ item:'handbook', title:'c++'}, { item:'book', title:'javasrcipt'}].some(function(el){
if( el.item === element.item && el.title === element.title ){
return true;
}
});
[['ha...
How do I declare a namespace in JavaScript?
How do I create a namespace in JavaScript so that my objects and functions aren't overwritten by other same-named objects and functions? I've used the following:
...
Best practice for Python assert
... when x become less than zero throughout the function. You can use class descriptors. Here is an example:
class LessThanZeroException(Exception):
pass
class variable(object):
def __init__(self, value=0):
self.__x = value
def __set__(self, obj, value):
if value < 0:
...
Setting element of array from Twig
...op.index0) : {'url': item.content['#url'].getUri(), 'text': item.content['#title']} }) %}
{% endfor %}
{%
set linkList = {
'title': label,
'links': links
}
%}
{% include '<to twig file>/link-list.twig'%}
Thanks for this thread -- I was also able to create an array with (loop.index0) an...
MySQL, better to insert NULL or empty string?
...abase adapters / ORMs map NULL to None.
So things like:
print "Hello, %(title)s %(firstname) %(lastname)!" % databaserow
might result in "Hello, None Joe Doe!" To avoid it you need something like this code:
if databaserow.title:
print "Hello, %(title)s %(firstname) %(lastname)!" % database...
Really Cheap Command-Line Option Parsing in Ruby
...but it's still falsey, so it works just fine for throwaway tools and quick scripts.
One caveat pointed out by FelipeC in the comments in "How to do really cheap command-line option parsing in Ruby", is that your shell might not support the 3-token shebang; you may need to replace /usr/bin/env ruby ...
How to use FormData for AJAX file upload?
...) for processing
var form = $('form')[0]; // You need to use standard javascript object here
var formData = new FormData(form);
or specify exact data for FormData()
var formData = new FormData();
formData.append('section', 'general');
formData.append('action', 'previewImg');
// Attach file
formD...
How to set the title of UIButton as left alignment?
... Thanks, It helped me. I was not able to find out edge insets for button title without the help of arrow indication in your sample pictures.
– Ashok
Jul 9 '15 at 9:55
...
MongoDB sort排序、index索引教程 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...中的数据如下：
{ "_id" : ObjectId("56066542ade2f21f36b0313a"), "title" : "PHP 教程", "description" : "PHP 是一种创建动态交互性站点的强有力的服务器端脚本语言。", "by" : "菜鸟教程", "url" : "https://www.tsingfun.com", "tags" : [ "php" ], "likes" : 200 }
{ "_i...
phpcms标签向导有什么用？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...="" moreinfo="1" num="5" }
{loop $data $n $r}
<li><a href="{$r['url']}" title="{$r['title']}">{$r['title']}</a></li>
{/loop}
{/pc}
2、以SQL方式，从数据源1014_website,调取最新的5条新闻，并按倒序排列
{pc:get sql="SELECT title,url FROM v9_news order by id desc" num="5" ...