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Can Powershell Run Commands in Parallel?
... have a powershell script to do some batch processing on a bunch of images and I'd like to do some parallel processing. Powershell seems to have some background processing options such as start-job, wait-job, etc, but the only good resource I found for doing parallel work was writing the text of a ...
Creating a expressjs middleware that accepts parameters
...second definition of the function. What is happening there? I don't understand the following line return HasRole[role] || (HasRole[role] = function(req, res, next) {
– Rafay Hassan
Feb 12 '19 at 8:25
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'Missing contentDescription attribute on image' in XML
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Follow this link for solution: Android Lint contentDescription warning
Resolved this warning by setting attribute android:contentDescription
for my ImageView
android:contentDescription="@string/desc"
Android Lint support in ADT 16 throws this warning to e...
Is it better in C++ to pass by value or pass by constant reference?
...l types, except for builtin types (char, int, double, etc.), for iterators and for function objects (lambdas, classes deriving from std::*_function).
This was especially true before the existence of move semantics. The reason is simple: if you passed by value, a copy of the object had to be made an...
How do I use a file grep comparison inside a bash if/else statement?
...t status is 0 if any line was selected, 1 otherwise;
if any error occurs and -q was not given, the exit status is 2.
if grep --quiet MYSQL_ROLE=master /etc/aws/hosts.conf; then
echo exists
else
echo not found
fi
You may want to use a more specific regex, such as ^MYSQL_ROLE=master$, to avo...
How do I use the ternary operator ( ? : ) in PHP as a shorthand for “if / else”?
Based on the examples from this page , I have the working and non-working code samples below.
14 Answers
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How to upgrade Git to latest version on macOS?
I just bought a new Mac with OS X Lion and I checked in the Terminal what version of git is installed by default. I got the answer
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C++ template constructor
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As far as I understand, it's impossible to have it (because it would conflict with the default constructor - am I right?)
You are wrong. It doesn't conflict in any way. You just can't call it ever.
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How do I get the type of a variable?
...ns integer on your compiler. The names returned are not specified by the standard.
– Bo Persson
Jul 3 '12 at 12:59
12
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Return from lambda forEach() in java
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Here filter restricts the stream to those items that match the predicate, and findFirst then returns an Optional with the first matching entry.
This looks less efficient than the for-loop approach, but in fact findFirst() can short-circuit - it doesn't generate the entire filtered stream and then ...