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Fastest check if row exists in PostgreSQL
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This is better, because it will always return a value (true or false) instead of sometimes None (depending on your programing language) which might not expand the way you expect.
– isaaclw
Jun 10 '14 at 23:18
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Max size of an iOS application
...cutable file (for example, app_name.app/app_name) must not exceed these limits:
For apps whose MinimumOSVersion is less than 7.0: maximum of 80 MB for the total of all __TEXT sections in the binary.
For apps whose MinimumOSVersion is 7.x through 8.x: maximum of 60 MB per slice for the __TEXT sectio...
Can a unit test project load the target application's app.config file?
I am unit testing a .NET application (.exe) that uses an app.config file to load configuration properties. The unit test application itself does not have an app.config file.
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How do I use IValidatableObject?
...l, null),
results,
validateAllProperties);
}
It is important to set validateAllProperties to false for this method to work. When validateAllProperties is false only properties with a [Required] attribute are checked. This allows the IValidatableObject.Validate() metho...
ProcessStartInfo hanging on “WaitForExit”? Why?
...an become full. Whatever order you use, there can be a problem:
If you wait for the process to exit before reading StandardOutput the process can block trying to write to it, so the process never ends.
If you read from StandardOutput using ReadToEnd then your process can block if the process never...
How to grant remote access permissions to mysql server for user?
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This grants root access with the same password from any machine in *.example.com:
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%.example.com'
IDENTIFIED BY 'some_characters'
WITH GRANT OPTION;
FLUSH PRIVILEGES;
If name resolution is not going ...
How to trim a file extension from a String in JavaScript?
... use regular expressions, you can try this (less performant):
filename.split('.').slice(0, -1).join('.')
Note that it will fail on files without extension.
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How to change the blue highlight color of a UITableViewCell?
I'm wondering how to change the blue highlight/selection color of a UITableViewCell , any ideas?
11 Answers
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NSInvocation for Dummies?
...e:
An NSInvocation is an Objective-C message rendered static, that is, it is an action turned into an object.
And, in a little more detail:
The concept of messages is central to the objective-c philosophy. Any time you call a method, or access a variable of some object, you are sending it a m...
Calling a function of a module by using its name (a string)
What is the best way to go about calling a function given a string with the function's name in a Python program. For example, let's say that I have a module foo , and I have a string whose content is "bar" . What is the best way to call foo.bar() ?
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