大约有 7,300 项符合查询结果（耗时：0.0291秒） [XML]
NumPy or Pandas: Keeping array type as integer while having a NaN value
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This capability has been added to pandas (beginning with version 0.24):
https://pandas.pydata.org/pandas-docs/version/0.24/whatsnew/v0.24.0.html#optional-integer-na-support
At this point, it requires the use of extension dtype Int64 (capitalized), rather than the default dtype int64 (...
How to call shell commands from Ruby
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This explanation is based on a commented Ruby script from a friend of mine. If you want to improve the script, feel free to update it at the link.
First, note that when Ruby calls out to a shell, it typically calls /bin/sh, not Bash. Som...
How to execute a Python script from the Django shell?
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Another solution that appears to work for both Python 2.x and 3.x is echo 'import myscript' | python manage.py shell. I've found this can be useful for quick-and-dirty scripts that you only need to run once, without having to go through t...
Enter triggers button click
...irst button or input with type="submit" is what is triggered in this situation. If you specifically set type="button", then it's removed from consideration by the browser.
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Select text on input focus
...he autoselect for you.
module.directive('selectOnClick', ['$window', function ($window) {
return {
restrict: 'A',
link: function (scope, element, attrs) {
element.on('click', function () {
if (!$window.getSelection().toString()) {
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Searching for UUIDs in text with regex
...UUIDs in blocks of text using a regex. Currently I'm relying on the assumption that all UUIDs will follow a patttern of 8-4-4-4-12 hexadecimal digits.
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Connecting overloaded signals and slots in Qt 5
...ing to grips with the new signal/slot syntax (using pointer to member function) in Qt 5, as described in New Signal Slot Syntax . I tried changing this:
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Is there a native jQuery function to switch elements?
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Yeah, this should work: The documentation says: "If an element selected this way is inserted elsewhere, it will be moved before the target (not cloned)".
– Ridcully
Jan 11 '12 at 15:55
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Create singleton using GCD's dispatch_once in Objective-C
If you can target iOS 4.0 or above
10 Answers
10
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Changing route doesn't scroll to top in the new page
I've found some undesired, at least for me, behaviour when the route changes.
In the step 11 of the tutorial http://angular.github.io/angular-phonecat/step-11/app/#/phones
you can see the list of phones. If you scroll to the bottom and click on one of the latest, you can see that the scroll isn't ...