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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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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 ...
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...
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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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...
How to find elements with 'value=x'?
I need to remove element that have value="123" . I know that all elements with different values are located into #attached_docs , but I don't know how to select element with value="123" .
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How to print pandas DataFrame without index
... len(df)
df.index=blankIndex
If we use the data from your post:
row1 = (123, '2014-07-08 00:09:00', 1411)
row2 = (123, '2014-07-08 00:49:00', 1041)
row3 = (123, '2014-07-08 00:09:00', 1411)
data = [row1, row2, row3]
#set up dataframe
df = pd.DataFrame(data, columns=('User ID', 'Enter Time', 'Acti...
Fastest way to convert string to integer in PHP
Using PHP, what's the fastest way to convert a string like this: "123" to an integer?
8 Answers
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