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Is Java really slow?
...it carries a small performance cost. UTF-8 looks like a better choice now.
Array access is a bit slower compared to C, due to bounds checks. The penalty used to be big, but is now small (Java 7 optimizes away a lot of redundant bounds checks).
Lack of arbitrary memory access can make some I/O and bi...
Assign pandas dataframe column dtypes
...
Another way to set the column types is to first construct a numpy record array with your desired types, fill it out and then pass it to a DataFrame constructor.
import pandas as pd
import numpy as np
x = np.empty((10,), dtype=[('x', np.uint8), ('y', np.float64)])
df = pd.DataFrame(x)
df.dty...
How to map and remove nil values in Ruby
...pact
=> [1, 3]
I'd like to remind people that if you're getting an array containing nils as the output of a map block, and that block tries to conditionally return values, then you've got code smell and need to rethink your logic.
For instance, if you're doing something that does this:
[1...
PHP mailer multiple address [duplicate]
...m', 'Person Two');
// ..
To make things easy, you should loop through an array to do this.
$recipients = array(
'person1@domain.com' => 'Person One',
'person2@domain.com' => 'Person Two',
// ..
);
foreach($recipients as $email => $name)
{
$mail->AddCC($email, $name);
}
...
Get content of a cell given the row and column numbers
...
Try =index(ARRAY, ROW, COLUMN)
where:
Array: select the whole sheet
Row, Column: Your row and column references
That should be easier to understand to those looking at the formula.
...
Backbone.js: How to get the index of a model in a Backbone Collection?
...It's also strange, because indexOf, in the underscore documentation, is an array function, whereas another array function, findIndex, doesn't work with collections.
– Joshua Taylor
Oct 1 '15 at 18:29
...
How to get current PHP page name [duplicate]
...lso...You can replace the .php extension and hyphens ucwords( str_ireplace(array('-', '.php'), array(' ', ''), basename($_SERVER['PHP_SELF']) ) ) and Capitalize Words with ucwords or first letter using ucfirst. Maybe somebody will need this...
– Andrew Surdu
Se...
解决WaitForSingleObject阻塞UI线程的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...be wait
__in const HANDLE* pHandles, //An array of object handles.
__in BOOL bWaitAll, //If this parameter is TRUE, the function returns when the states
//of all objects in the pHan...
Too much data with var_dump in symfony2 doctrine2
...var_dump($user) or any entity my browser gets loaded with too much data of arrays and variables then it just crashed.
9 Ans...
Is there an online name demangler for C++? [closed]
... -t
See it live with this example which demangles:
_Z6kernelIfLj3EEvPT_5arrayIPKS0_XT0_EES5_S2_IjXT0_EES6_S0_
to:
void kernel<float, 3u>(float*, array<float const*, 3u>, array<float const*, 3u>, array<unsigned int, 3u>, array<unsigned int, 3u>, float)
^...