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Quick unix command to display specific lines in the middle of a file?
... is working
– Basav
Jun 21 '13 at 5:40
5
This is actually not what you want because it will proce...
How do I get a YouTube video thumbnail from the YouTube API?
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answered Jan 14 '10 at 23:40
AsaphAsaph
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php each与list的用法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...外一个例子：
<?php
list($a,$b,,$c)=array(2=>10,3=>20,4=>30,1=>40);
echo $a,'~',$b,'~',$c,'<br />';
//返回notice~40~20
//执行到$a的时候返回给我一个notice：说数组没有0键
?>
按照一般的想法应该会返回：10~20~40
为什么会返回这个notice~40~20呢？...
Apply CSS Style to child elements
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This code "div.test th, td, caption {padding:40px 100px 40px 50px;}" applies a rule to all th elements which are contained by a div element with a class named test, in addition to all td elements and all caption elements.
It is not the same as "all td, th and caption e...
How to change the map center in Leaflet.js
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For example:
map.panTo(new L.LatLng(40.737, -73.923));
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Minimizing NExpectation for a custom distribution in Mathematica
...we plot pdf2 it looks exactly as your Plot
Plot[pdf2[3.77, 1.34, -2.65, 0.40, x], {x, 0, .3}]
Now to the expected value. If I understand it correctly we have to integrate x * pdf[x] from -inf to +inf for a normal expected value.
x * pdf[x] looks like
Plot[pdf2[3.77, 1.34, -2.65, 0.40, x]*x, ...
Selecting with complex criteria from pandas.DataFrame
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406
Sure! Setup:
>>> import pandas as pd
>>> from random import randint
>&g...
A simple explanation of Naive Bayes Classification
...D objects / total number of objects
Since there is a total of 60 objects, 40 of which are GREEN and 20 RED, our prior probabilities for class membership are:
Prior Probability for GREEN: 40 / 60
Prior Probability for RED: 20 / 60
Having formulated our prior probability, we are now ready to class...
What does a double * (splat) operator do
..., {}]
> foo 10, 20, 30
=> [10, [20, 30], {}]
> foo 10, 20, 30, d: 40, e: 50
=> [10, [20, 30], {:d=>40, :e=>50}]
> foo 10, d: 40, e: 50
=> [10, [], {:d=>40, :e=>50}]
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URL: Username with @
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You need to URL encode the @ as %40.
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