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Is it safe to use -1 to set all bits to true?
... why is -1 guaranteed to be converted to all ones? Is that guaranteed by the standard?
– jalf
Apr 30 '09 at 22:11
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Caching a jquery ajax response in javascript/browser
...esentation.
Use Console view (F12) or FireBug to view some logs generated by the cache.
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Git alias with positional parameters
...portant - it prevents all the user-supplied arguments from being processed by the shell (it comments them out).
Note: git puts all user-supplied arguments at the end of the command line. To see this in action, try: GIT_TRACE=2 git files a b c d
The escaped (due to nesting) quotes are important for...
How do I design a class in Python?
..., you have almost no mutable data. What you have is derived data, created by transformation functions from the source dataset.
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Rails 3 check if attribute changed
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Check out ActiveModel::Dirty (available on all models by default). The documentation is really good, but it lets you do things such as:
@user.street1_changed? # => true/false
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@UniqueConstraint and @Column(unique = true) in hibernate annotation
...nce the unique constraint is created am I able to reference the constraint by name in my JPA Repository to query on that?
– jDub9
Jan 9 '18 at 18:48
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Is there a way to suppress warnings in Xcode?
...ings look at the GCC warnings located at the bottom of the build tab page, by clicking on each warning it will tell you the warning parameter name:
e.g.
Warn whenever a function parameter is
unused aside from its declaration.
[GCC_WARN_UNUSED_PARAMETER,
-Wunused-parameter]
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Calendar returns wrong month [duplicate]
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As is clear by the many answers: the month starts with 0.
Here's a tip: you should be using SimpleDateFormat to get the String-representation of the month:
Calendar rightNow = Calendar.getInstance();
java.text.SimpleDateFormat df1 = n...
Is there a standard naming convention for git tags? [closed]
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Version 1.0.0 of Semantic Versioning, by Tom Preston-Werner of GitHub fame, had a sub-specification addressing this:
Tagging Specification (SemVerTag)
This sub-specification SHOULD be used if you use a version control system (Git, Mercurial,
SVN, etc)...
What is the “__v” field in Mongoose
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The versionKey is a property set on each document when first created
by Mongoose. This keys value contains the internal revision of the
document. The name of this document property is configurable. The
default is __v.
If this conflicts with your application you can configure as such:
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