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ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.al

...al code mask = ((r["dt"] >= startdate) & (r["dt"] <= enddate)) selected = r[mask] looks correct. However, if you do want and, then instead of a and b use (a-b).any() or (a-b).all(). share | ...
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How to change the output color of echo in Linux

...use different numbers, not given here. Text mode commands tput bold # Select bold mode tput dim # Select dim (half-bright) mode tput smul # Enable underline mode tput rmul # Disable underline mode tput rev # Turn on reverse video mode tput smso # Enter standout (bold) mode tput...
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Determine what attributes were changed in Rails after_save callback?

... The "selected" answer didn't work for me. I'm using rails 3.1 with CouchRest::Model (based on Active Model). The _changed? methods don't return true for changed attributes in the after_update hook, only in the before_update hook. ...
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How do I create ColorStateList programmatically?

... try any of those solutions, pay attention to the order the states like in selector.xml! – Anton Makov Oct 4 '19 at 12:34  |  show 2 more comm...
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jQuery - get a list of values of an attribute from elements of a class

... to get a list of all the different values of level on the page so I can select the highest one. 5 Answers ...
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Is there a CSS selector for the first direct child only?

... it seems the OP is not asking about the selector as much as why the rule is being applied to all the child divs. – Doug Neiner Jan 19 '10 at 15:29 ...
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Signing a Windows EXE file

... /v "C:\filename.dll" Method 2: Using Windows Right-click the signed file Select Properties Select the Digital Signatures tab. The signature will be displayed in the Signature list section. I hope this could help you Sources: https://docs.microsoft.com/en-us/previous-versions/windows/internet-e...
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How do I set the maximum line length in PyCharm?

...ode style->python : ensure right margin is not exceeded. Once this was selected the reformat would work. share | improve this answer | follow | ...
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What is MyAssembly.XmlSerializers.dll generated for?

... from being auto-generated are: In VS, right-click your project file and select "Properties" Click the "Build" tab Change the "Generate serialization assembly" dropdown from "Auto" to "Off" Rebuild and it will be gone sha...
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How can I check if the current date/time is past a set date/time?

... answered May 14 '10 at 7:26 Select0rSelect0r 11.3k99 gold badges3838 silver badges5656 bronze badges ...