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“unpacking” a tuple to call a matching function pointer
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@Xeverous: 1. doesn't work from the signatures: your std::make_unique expects a tuple, and a tuple can be created from an unpacked tuple only via another call to std::make_tuple. This is what I've done in the lambda (although it's highly redundant, as ...
How to use 'cp' command to exclude a specific directory?
...pied before performing real operation, and if everything is ok, remove -n from command line.
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How do I Search/Find and Replace in a standard string?
...ith all the calls to "replace" : complexity would be n² if you remove "o" from "ooooooo...o". I guess one can do better, but this solution has the merit of being easy to understand.
– Zonko
Sep 21 '11 at 8:57
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How to save a list as numpy array in python?
Is possible to construct a NumPy array from a python list?
9 Answers
9
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Check whether a string is not null and not empty
... && fails, thus ensuring you will not get a null pointer exception from str.isEmpty() if str is null.
Beware, it's only available since Java SE 1.6. You have to check str.length() == 0 on previous versions.
To ignore whitespace as well:
if(str != null && !str.trim().isEmpty())
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Call PowerShell script PS1 from another PS1 script inside Powershell ISE
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I am calling myScript1.ps1 from myScript2.ps1 .
Assuming both of the script are at the same location, first get the location of the script by using this command :
$PSScriptRoot
And, then, append the script name you want to call like this :
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What exactly is Python's file.flush() doing?
...that the data is written to disk. It may just mean that the data is copied from the buffers maintained by your runtime into the buffers maintained by the operating system.
If you write something, and it ends up in the buffer (only), and the power is cut to your machine, that data is not on disk whe...
Getting attributes of a class
... if _[0] in '__dict__'][0] and then it's just a matter of getting the keys from z.
– double0darbo
Nov 11 '19 at 21:19
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How to trim leading and trailing white spaces of a string?
... to trim strings in go.
See them there : Trim
Here's an example, adapted from the documentation, removing leading and trailing white spaces :
fmt.Printf("[%q]", strings.Trim(" Achtung ", " "))
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Rollback a Git merge
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From here:
http://www.christianengvall.se/undo-pushed-merge-git/
git revert -m 1 <merge commit hash>
Git revert adds a new commit that rolls back the specified commit.
Using -m 1 tells it that this is a merge and w...