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Is the primary key automatically indexed in MySQL?
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I found that link by searching before I asked the question. But it doesn't seem to imply that or anything else much about this question to me.
– Alex Miller
Jul 1 '09 at 20:45
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Is there a better way to dynamically build an SQL WHERE clause than by using 1=1 at its beginning?
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One solution is to simply not write queries manually by appending strings. You could use an ORM, like Entity Framework, and with LINQ to Entities use the features the language and framework offer you:
using (var dbContext = new MyDbContext())
{
IQueryable<Table1Item>...
How to validate an OAuth 2.0 access token for a resource server?
...le that would demonstrate Client Credentials Grant with Rest API protected by a local Resource Server and PingFederate as the Auth Server. The local resource server will then call the validation endpoint. Have you come across anything like that?
– JavaHead
Feb ...
javac error: Class names are only accepted if annotation processing is explicitly requested
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I was stumped by this too because I was including the .Java extension ... then I noticed the capital J.
This will also cause the "annotation processing" error:
javac myclass.Java
Instead, it should be:
javac myclass.java
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What is Serialization?
...rialization is the process of turning an object in memory into a stream of bytes so you can do stuff like store it on disk or send it over the network.
Deserialization is the reverse process: turning a stream of bytes into an object in memory.
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filter for complete cases in data.frame using dplyr (case-wise deletion)
...using this filter in a dplyr pipe with other dplyr commands (such as group_by()), you will need to add %>% data.frame() %>% before you try and filter on complete.cases(.) because it won't work on tibbles or grouped tibbles or something. Or at least, that has been the experience I have had.
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What are “decorators” and how are they used?
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decorator can intercept service instance created by factory, service, value, provider, and gives the options to change some instance(service) that is otherwise not configurable / with options.
It can also provide mock up instances for testing purpose, for example $http.
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RuntimeException: Unable to instantiate application
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This is a verbose error message raised by underlying framework when dalvik re-install .apk file and trying to reuse or recycle the previous opened activity/view from the same package (if you haven't closed the previous installed app yet). It has nothing to do with...
Set the maximum character length of a UITextField
...s no max length property, it's relatively simple to get this functionality by setting the text field's delegate and implementing the following delegate method:
Objective-C
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
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How can I discard remote changes and mark a file as “resolved”?
...m into the index from another revision first). The way it distinguishes is by whether you've passed a filename in; if you haven't passed in a filename, it tries switching branches (though if you don't pass in a branch either, it will just try checking out the current branch again), but it refuses to...