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Convert Pandas column containing NaNs to dtype `int`
...For one of the columns, namely id , I want to specify the column type as int . The problem is the id series has missing/empty values.
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Replace values in list using Python [duplicate]
...w list with a list comprehension:
new_items = [x if x % 2 else None for x in items]
You can modify the original list in-place if you want, but it doesn't actually save time:
items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for index, item in enumerate(items):
if not (item % 2):
items[index...
Javascript : Send JSON Object with Ajax?
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With jQuery:
$.post("test.php", { json_string:JSON.stringify({name:"John", time:"2pm"}) });
Without jQuery:
var xmlhttp = new XMLHttpRequest(); // new HttpRequest instance
xmlhttp.open("POST", "/json-handler");
xmlhttp.setRequestHeader("Content-Type", "applicat...
WHERE vs HAVING
...columns you create yourself (for example select 1 as "number" ) after HAVING and not WHERE in MySQL?
7 Answers
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SQL Group By with an Order By
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In all versions of MySQL, simply alias the aggregate in the SELECT list, and order by the alias:
SELECT COUNT(id) AS theCount, `Tag` from `images-tags`
GROUP BY `Tag`
ORDER BY theCount DESC
LIMIT 20
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Entity Framework and SQL Server View
For several reasons that I don't have the liberty to talk about, we are defining a view on our Sql Server 2005 database like so:
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Stop all active ajax requests in jQuery
I have a problem, when submitting a form all active ajax request fail, and that triggers error event.
16 Answers
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How do you query for “is not null” in Mongo?
I would like to execute a following query:
10 Answers
10
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Routing: The current request for action […] is ambiguous between the following action methods
...e user can enter a search term, or leave the search term blank. When entering the search term, I want to direct the page to http://localhost:62019/Gallery/Browse/{Searchterm} and when nothing is entered, I want to direct the browser to http://localhost:62019/Gallery/Browse/Start/Here .
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Replace Fragment inside a ViewPager
I'm trying to use Fragment with a ViewPager using the FragmentPagerAdapter .
What I'm looking for to achieve is to replace a fragment, positioned on the first page of the ViewPager , with another one.
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