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Detect if value is number in MySQL
...l1 * 1) = col1
It doesn't work for non-standard numbers like
1e4
1.2e5
123. (trailing decimal)
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C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
...printf的源代码的这里
声明部分：
int pos =0 ,cnt_printed_chars =0 ,i ;
unsigned char *chptr ;
va_list ap ;
%s格式控制部分：
case 's':
chptr =va_arg (ap ,unsigned char *);
i =0 ;
while (chptr [i ])
...
Java Generics (Wildcards)
...me pretty good explanations of generics in the articles Wildcards and More Fun with Wildcards.
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MySQL Conditional Insert
...nsert, try:
INSERT INTO x_table(instance, user, item)
SELECT 919191, 123, 456
FROM dual
WHERE NOT EXISTS (SELECT * FROM x_table
WHERE user = 123
AND item = 456)
In this, dual is a table with one row only (found orig...
How to sort my paws?
...ething working consistently! This problem pulled me in for several days... Fun stuff! Sorry for the length of this answer, but I need to elaborate a bit on some things... (Though I may set a record for the longest non-spam stackoverflow answer ever!)
As a side note, I'm using the full dataset that ...
How do I pre-populate a jQuery Datepicker textbox with today's date?
... Why is it in your demo it works. When I copy this code into my site the dialog keeps popping up when the pg loads.
– chobo2
Sep 9 '12 at 0:38
1
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CSS: bolding some text without changing its container's size
...important; text-shadow: none!important; }
<li class="shadow0">MmmIii123 This line tests shadow0 (plain)</li>
<li class="shadow2">MmmIii123 This line tests shadow2 (0.02ex)</li>
<li class="shadow4">MmmIii123 This line tests shadow4 (0.04ex)</li>
<li class="s...
ImportError: No module named apiclient.discovery
...y --upgrade google-api-python-client and it says Installed c:\python27\lib\site-packages\google_api_python_client-1.3.1-py2.7.egg and trying to install again google-api-python-client 1.3.1 is already the active version in easy-install.pth
– Edmund Sulzanok
Dec ...
Difference between @Before, @BeforeClass, @BeforeEach and @BeforeAll
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Before and BeforeClass in JUnit
The function @Before annotation will be executed before each of test function in the class having @Test annotation but the function with @BeforeClass will be execute only one time before all the test functions in the class.
Simi...
What is the difference between “int” and “uint” / “long” and “ulong”?
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This is quite fun to work out by hand. A 32-bit signed variable uses 1 bit for the sign (positive or negative) so can store values between -2^31 and +2^31 - 1
– Jaco Pretorius
Sep 16 '10 at 8:29
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