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SQLite select where empty?
...
SELECT * FROM your_table WHERE some_column IS NULL OR some_column = '';
Test case:
CREATE TABLE your_table (id int, some_column varchar(10));
INSERT INTO your_table VALUES (1, NULL);
INSERT INTO your_table VALUES (2, '');
INSERT INTO your_table VALUES (3, 'test');
INSERT INTO your_table VALUES ...
HTML/CSS: Making two floating divs the same height
... <div id="container">
<div id="left-col">
<p>Test content</p>
<p>longer</p>
</div>
<div id="right-col">
<p>Test content</p>
</div>
</div>
</body>
I think it worth mention...
HAproxy - Web负载均衡解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...SERVERID可在下面使用cookie关键字定义
option httpchk GET /test/index.php
# 开启对后端服务器的健康检测，通过GET /test/index.php来判断后端服务器的健康情况
server php_server_1 10.12.25.68:80 cookie 1 check inter 2000 rise 3 fall 3 weight 2
serv...
Unicode (UTF-8) reading and writing to files in Python
...method from the io module.
>>>import io
>>>f = io.open("test", mode="r", encoding="utf-8")
Then after calling f's read() function, an encoded Unicode object is returned.
>>>f.read()
u'Capit\xe1l\n\n'
Note that in Python 3, the io.open function is an alias for the bui...
How do I configure different environments in Angular.js?
...ects the current domain and sets the environment appropriately – time to test it out!
– StevieP
May 17 '16 at 12:06
add a comment
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What does @@variable mean in Ruby?
...xample; its output is in the comments at the end of the puts lines:
class Test
@@shared = 1
def value
@@shared
end
def value=(value)
@@shared = value
end
end
class AnotherTest < Test; end
t = Test.new
puts "t.value is #{t.value}" # 1
t.value = 2
puts "t.value is #{t.value}"...
Will code in a Finally statement fire if I return a value in a Try block?
...
Here's a little test:
class Class1
{
[STAThread]
static void Main(string[] args)
{
Console.WriteLine("before");
Console.WriteLine(test());
Console.WriteLine("after");
}
static string test()
{...
Best way to remove from NSMutableArray while iterating?
...nt write out the code :P.. thnx m8
– FlowUI. SimpleUITesting.com
Oct 1 '13 at 23:33
3
This is the...
Getting visitors country from their IP
...
Follow on: this is an issue when testing a site on localhost. Any way to fix for testing purposes? Uses the standard 127.0.0.1 localhost IP
– Nick
Feb 6 '17 at 14:18
...
Where to place JavaScript in an HTML file?
.... But the savings in transferred bytes can be enormous.
I've successfully tested it in Firefox 3, MSIE 7, Opera 9, and Google Chrome. It apparently doesn't work this way in Safari 3.
For more info, see this blog post, and another very ancient page that nevertheless is useful because it points out ...