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How get integer value from a enum in Rails?
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edited Oct 7 '16 at 0:09
answered Nov 5 '14 at 11:32
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How to Remove ReadOnly Attribute on File Using PowerShell?
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You can use Set-ItemProperty:
Set-ItemProperty file.txt -name IsReadOnly -value $false
or shorter:
sp file.txt IsReadOnly $false
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Null coalescing in powershell
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Powershell 7+
Powershell 7 introduces native null coalescing, null conditional assignment, and ternary operators in Powershell.
Null Coalescing
$null ?? 100 # Result is 100
"Evaluated" ?? (Expensive-Operation "Not Evaluated") # Right side here is not evaluated
Null Conditional Assignm...
Get last element of Stream/List in a one-liner
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It is possible to get the last element with the method Stream::reduce. The following listing contains a minimal example for the general case:
Stream<T> stream = ...; // sequential or parallel stream
Optional<T> l...
Why does JQuery have dollar signs everywhere?
I am working on a project with quite a lot of JQuery in it. The JQuery has a lot of $ signs everywhere, for example
7 Answ...
javac is not recognized as an internal or external command, operable program or batch file [closed]
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TL;DR
For experienced readers:
Find the Java path; it looks like this: C:\Program Files\Java\jdkxxxx\bin\
Start-menu search for "environment variable" to open the options dialog.
Examine PATH. Remove old Java paths.
Add the new Java path to PATH.
Edit JAVA_HOME.
Close and re-...
window.location.href and window.open () methods in JavaScript
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window.location.href is not a method, it's a property that will tell you the current URL location of the browser. Changing the value of the property will redirect the page.
window.open() is a method that you can pass a URL to that you want to open in a new window...
When should I use C++ private inheritance?
Unlike protected inheritance, C++ private inheritance found its way into mainstream C++ development. However, I still haven't found a good use for it.
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how to “reimport” module to python then code be changed after import
... Python 3.x
import importlib
import foo #import the module here, so that it can be reloaded.
importlib.reload(foo)
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Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
I want to slice a NumPy nxn array. I want to extract an arbitrary selection of m rows and columns of that array (i.e. without any pattern in the numbers of rows/columns), making it a new, mxm array. For this example let us say the array is 4x4 and I want to extract a 2x2 array from it.
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