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String isNullOrEmpty in Java? [duplicate]
...en asked before, but Googling doesn't find it . Is there, in any of the standard java libraries (including apache/google/...), a static isNullOrEmpty() method for Strings ?
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How to git clone a specific tag
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Note if the ref is ambiguous and you have a branch and a tag named the same thing, this will prefer the branch.
– Keith Smiley
Feb 21 '18 at 22:18
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How to execute an .SQL script file using c#
... Great! This solution worked for me for being able to drop and recreate a database, and add tables (via the referenced SQL script file).
– Ogre Psalm33
Dec 2 '09 at 13:31
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How to split a sequence into two pieces by predicate?
... span.
The first one, partition will put all "true" elements in one list, and the others in the second list.
span will put all elements in one list until an element is "false" (in terms of the predicate). From that point forward, it will put the elements in the second list.
scala> Seq(1,2,3,4)...
How to get an array of specific “key” in multidimensional array without looping
...since the code is open source you can copy paste the code in your project (and rename the function to something you prefer, like array_pick). View source here
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git branch -d gives warning
Just want to get a better understanding of the warning message after I deleted a local branch
4 Answers
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How to get the start time of a long-running Linux process?
... that ps will report the date (not the time) if it wasn't started today, and only the year if it wasn't started this year. Is the precision lost forever for old processes?
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What does -D_XOPEN_SOURCE do/mean?
...nclude definitions for some extra functions that are defined in the X/Open and POSIX standards.
This will give you some extra functionality that exists on most recent UNIX/BSD/Linux systems, but probably doesn't exist on other systems such as Windows.
The numbers refer to different versions of the...
Python Pandas: Get index of rows which column matches certain value
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50 True
[3 rows x 1 columns]
If you have a boolean array, mask, and need ordinal index values, you can compute them using np.flatnonzero:
In [110]: np.flatnonzero(df['BoolCol'])
Out[112]: array([0, 3, 4])
Use df.iloc to select rows by ordinal index:
In [113]: df.iloc[np.flatnonzero(df...
Rails: how do I validate that something is a boolean?
...ield (the field would not be valid for a false value). But in both Rails 3 and 4, having validates :field, inclusion: [true, false] would test for inclusion in a list of values, with the side-effect to test for the field's presence (unless one of those values is nil of course).
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