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Check existence of input argument in a Bash shell script
...ally ignores the arguments it is provided. It is essential in this test in order to keep the interpreter from trying to execute the contents of "$varname" (which you certainly do NOT want to happen). Also worth noting; you can test as many variables with this method as you wish. And all with specifi...
INotifyPropertyChanged vs. DependencyProperty in ViewModel
... in. From a pure point of view you shouldn't use DP on a ViewModels.
"In order to be the source of a binding, a property does not need to be a dependency property; you can use any CLR property as a binding source. However, in order to be the target of a binding, the property must be a dependency p...
Apply pandas function to column to create multiple new columns?
... updating the row directly like this ended up being surprisingly slow - an order of magnitude slower than the apply with 'expand' + pd.concat solutions
– Dmytro Bugayev
Jun 30 at 17:33
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How to @link to a Enum Value using Javadoc
... I like @see but sometimes you need special cases. For example, my orders have an isWithdrawn() method, and I specifically say @return true if the status of this order is equal to OrderStatus#WITHDRAWN, false otherwise
– corsiKa
Oct 3 '13 at 17:21
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Default filter in Django admin
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In order to achieve this and have a usable 'All' link in your sidebar (ie one that shows all rather than showing pending), you'd need to create a custom list filter, inheriting from django.contrib.admin.filters.SimpleListFilter ...
Test iOS app on device without apple developer program or jailbreak
... the app.
Prior to Xcode 7, a Program membership was indeed required in order to sign the provisioning certificates required to deploy apps to devices. The only other alternative was jailbreaking. With Xcode 7, you no longer need to jailbreak your device just to run apps distributed outside the A...
“The underlying connection was closed: An unexpected error occurred on a send.” With SSL Certificate
...ed to TLS 1.2. As a result I had to install .net 4.5.2 on my web server in order to support it.
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Getting “Skipping JaCoCo execution due to missing execution data file” upon executing JaCoCo
...ue to an <argLine> configuration I added on maven-surefire-plugin in order to increase memory for Integration tests Configuring <argLine>${argLine} --my--additional-arguments--here-- </argLine> solved the problem
– Massimo Da Ros
Sep 18 '19 a...
Node.js throws “btoa is not defined” error
...rs (i.e. if you plan to exchange base64 between Node.js and a browser). In order to make it work you have to mark the input text as 'binary'.
Buffer.from('Hélló wórld!!', 'binary').toString('base64')
This gives you SOlsbPMgd/NybGQhIQ==. If you make atob('SOlsbPMgd/NybGQhIQ==') in a browser it...
Are Stored Procedures more efficient, in general, than inline statements on modern RDBMS's? [duplica
...t of stored procs have generally been from the following (in no particular order):
Pre-parsed SQL
Pre-generated query execution plan
Reduced network latency
Potential cache benefits
Pre-parsed SQL -- similar benefits to compiled vs. interpreted code, except on a very micro level.
Still an adva...