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How to test if list element exists?
..."a"
"bar$a" <- 42 # A variable actually called "bar$a"...
ls() # will include "foo" and "bar$a"
exists("foo$a") # FALSE
exists("bar$a") # TRUE
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An error occurred while validating. HRESULT = '8000000A'
...14/2017
the Microsoft Visual Studio 2017 Installer Projects extension now includes a command line helper tool for making the registry setting much easier to apply
Microsoft Visual Studio 2017 Installer Projects
Example paths of the tool (based on the version of Visual Studio installed)
Profes...
How can I pass data from Flask to JavaScript in a template?
...dition to Jinja2's standard set of filters.
Edit Nov 2018: tojson is now included in Jinja2's standard set of filters.
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What does the tilde before a function name mean in C#?
...class has a destructor, a C# compiler will auto-generate a finalizer which includes a generally-useless try/finally block that ensures that the parent Finalize method gets called. Most things that are true of destructors are true of finalizers, and vice versa, but the words mean slightly different ...
'typeid' versus 'typeof' in C++
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You can use Boost demangle to accomplish a nice looking name:
#include <boost/units/detail/utility.hpp>
and something like
To_main_msg_evt ev("Failed to initialize cards in " + boost::units::detail::demangle(typeid(*_IO_card.get()).name()) + ".\n", true, this);
...
Can Android Studio be used to run standard Java projects?
... plugin: 'kotlin'
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
>>> implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
>>> runtimeClasspath files(compileKotlin.destinationDir)
}
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Bonus step: Convert your main function...
Turn off constraints temporarily (MS SQL)
...ct answer as it answers the question completely. Not only that, but @Donal included a wildcard version which was very helpful for me.
– Matt Jackson
Aug 31 '17 at 20:46
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Joda-Time: what's the difference between Period, Interval and Duration?
... be resolved to an exact number of milliseconds by specifying the instant (including chronology and time zone) it is relative to. e.g. consider the period of 1 year, if we add this to January 1st we will always arrive at the next January 1st but the duration will depend on whether the intervening ye...
What 'additional configuration' is necessary to reference a .NET 2.0 mixed mode assembly in a .NET 4
... a CLR 2.0 mixed mode assembly, you need to modify your App.Config file to include:
<?xml version="1.0"?><configuration> <startup useLegacyV2RuntimeActivationPolicy="true"> <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/> </startup></configur...
spring boot default H2 jdbc connection (and H2 console)
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I included the latter property to show OP where he can access the console. Obviously spring.h2.console.enabled.enabled=false will disable the console, the point is that this is configurable as a property. I'll set that property...