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How to add new item to hash
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307
Create the hash:
hash = {:item1 => 1}
Add a new item to it:
hash[:item2] = 2
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Get pandas.read_csv to read empty values as empty string instead of nan
...d an option of some sort here:
https://github.com/pydata/pandas/issues/1450
In the meantime, result.fillna('') should do what you want
EDIT: in the development version (to be 0.8.0 final) if you specify an empty list of na_values, empty strings will stay empty strings in the result
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CPU Privilege Rings: Why rings 1 and 2 aren't used?
...art of the modern protection model) only has a concept of privileged (ring 0,1,2) and unprivileged, the benefit to rings 1 and 2 were diminished greatly.
The intent by Intel in having rings 1 and 2 is for the OS to put device drivers at that level, so they are privileged, but somewhat separated fro...
D3.js: How to get the computed width and height for an arbitrary element?
...().getBBox() you get values like
{
height: 5,
width: 5,
y: 50,
x: 20
}
For HTML elements
Use selection.node().getBoundingClientRect()
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Composite Key with EF 4.1 Code First
...plicit column order:
public class ActivityType
{
[Key, Column(Order = 0)]
public int ActivityID { get; set; }
[Key, Column(Order = 1)]
[Required(ErrorMessage = "A ActivityName is required")]
[StringLength(50, ErrorMessage = "Activity Name must not exceed 50 characters")]
pu...
How to get year/month/day from a date object?
alert(dateObj) gives Wed Dec 30 2009 00:00:00 GMT+0800
16 Answers
16
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How do you append to an already existing string?
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edited Feb 17 '17 at 10:23
lleaff
3,4451212 silver badges2222 bronze badges
answered Feb 12 '10 at 7...
SBT stop run without exiting
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edited Jul 26 '13 at 16:50
Eugene Yokota
88.3k4242 gold badges202202 silver badges296296 bronze badges
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Cancel/kill window.setTimeout() before it happens
...clear out a status, for example. I have a few of these that hang out for 10 seconds or more and if the user gets clicking around the action can occur at incorrect time intervals.
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How do I create a datetime in Python from milliseconds?
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Just convert it to timestamp
datetime.datetime.fromtimestamp(ms/1000.0)
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