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How to search through all Git and Mercurial commits in the repository for a certain string?
I have a Git repository with few branches and dangling commits. I would like to search all such commits in repository for a specific string.
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How to check whether a pandas DataFrame is empty?
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You can use the attribute df.empty to check whether it's empty or not:
if df.empty:
print('DataFrame is empty!')
Source: Pandas Documentation
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Cast an instance of a class to a @protocol in Objective-C
I have an object (a UIViewController) which may or may not conform to a protocol I've defined.
2 Answers
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what is the use of xsi:schemaLocation?
... read the schemaLocation values and try to load them from the internet, in order to validate the XML file. Spring, in turn, intercepts those load requests and serves up versions from inside its own JAR files.
If you omit the schemaLocation, then the XML parser won't know where to get the schema in ...
Why is no one using make for Java?
Just about every Java project that I've seen either uses Maven or Ant. They are fine tools and I think just about any project can use them. But what ever happened to make ? It's used for a variety of non-Java projects and can easily handle Java. Sure you have to download make.exe if you use Win...
Firebase Storage How to store and Retrieve images [closed]
How to store and view images on firebase?
6 Answers
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What can I do to resolve a “Row not found or changed” Exception in LINQ to SQL on a SQL Server Compa
...SQL connection (against SQL Server Compact Edition) I get a "Row not found or changed." ChangeConflictException.
15 Answers...
What algorithms compute directions from point A to point B on a map?
How do map providers (such as Google or Yahoo! Maps) suggest directions?
18 Answers
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Is JavaScript guaranteed to be single-threaded?
... all modern browser implementations, but is that specified in any standard or is it just by tradition? Is it totally safe to assume that JavaScript is always single-threaded?
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Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate
...cks up on these constraints and translates them into database constraints for you, so you get two for the price of one. @Column(nullable = false) is the JPA way of declaring a column to be not-null. I.e. the former is intended for validation and the latter for indicating database schema details. You...