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Is there a way to avoid null check before the for-each loop iteration starts? [duplicate]
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@Dataknife More like it just does the casting for you. There are no generics types at runtime with either case, and the implementation of emptyList() internally contains the cast (with a suppression on unchecked too).
– Edwin Buck
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Run an OLS regression with Pandas Data Frame
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I think you can almost do exactly what you thought would be ideal, using the statsmodels package which was one of pandas' optional dependencies before pandas' version 0.20.0 (it was used for a few things in pandas.stats.)
>>> import panda...
Interview questions: WPF Developer [closed]
...oned basic knowledge of XAML yet. Knowing what XAML is, and the ability to do some basic editing using XAML rather than a graphical design tool. Mid-level developers should be able to knock up form / graphic prototypes using a tool like XAMLPad.
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Stacking DIVs on top of each other?
... edited Jun 6 '19 at 20:39
dota2pro
4,22533 gold badges1818 silver badges4444 bronze badges
answered Dec 15 '09 at 19:14
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How to select rows that have current day's timestamp?
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If you want an index to be used and the query not to do a table scan:
WHERE timestamp >= CURDATE()
AND timestamp < CURDATE() + INTERVAL 1 DAY
To show the difference that this makes on the actual execution plans, we'll test with an SQL-Fiddle (an extremely helpful s...
Ruby on Rails: How do I add placeholder text to a f.text_field?
...d, :value => "password"
In your Javascript (assuming jquery here):
$(document).ready(function() {
//add a handler to remove the text
});
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HTML - how can I show tooltip ONLY when ellipsis is activated
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Here's a way that does it using the built-in ellipsis setting, and adds the title attribute on-demand (with jQuery) building on Martin Smith's comment:
$('.mightOverflow').bind('mouseenter', function(){
var $this = $(this);
if(this.o...
How to parse JSON using Node.js? [closed]
...adheres to ECMA standard. Therefore, node.js also has a global object JSON[docs].
Note - JSON.parse can tie up the current thread because it is a synchronous method. So if you are planning to parse big JSON objects use a streaming json parser.
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Redirecting stdout to “nothing” in python
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Cross-platform:
import os
import sys
f = open(os.devnull, 'w')
sys.stdout = f
On Windows:
f = open('nul', 'w')
sys.stdout = f
On Linux:
f = open('/dev/null', 'w')
sys.stdout = f
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How can I check if a string is null or empty in PowerShell?
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I like this way more as it is obvious what it does regardless of your Powerhsell knowledge -which would make sense for non-Powershell programmers.
– pencilCake
Dec 10 '12 at 6:07
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