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Random record from MongoDB
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Starting with the 3.2 release of MongoDB, you can get N random docs from a collection using the $sample aggregation pipeline operator:
// Get one random document from the mycoll collection.
db.mycoll.aggregate([{ $sample: { ...
ReactJS state vs prop
...rop the inner component had will change. So, when the re-rendering process starts, and shouldComponentUpdate gets invoked, this.props.value.foo will be equal to nextProps.value.foo, because in fact, this.props.value references the same object as nextProps.value.
Consequently, since we'll miss the c...
Unable to hide welcome screen in Emacs
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Add the following to your $HOME/.emacs:
(setq inhibit-startup-screen t)
The next time you start Emacs, the welcome screen shouldn't appear. If you already have Emacs open with the welcome screen, you can kill it with C-x k (Control-x, then k).
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.NET - Dictionary locking vs. ConcurrentDictionary
...more than just using the right collection. Using the right collection is a start, not the only thing you have to deal with. I guess that is what the OP wanted to know. I can't guess why this was accepted, it's been a while since I wrote this.
– Lasse V. Karlsen
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SQL Server ':setvar' Error
...compare generated script to build my database from my application on first startup after install, passing the script to an executenonquery(). I'll either need to find a way to execute this via SQLCMD mode or hack up the script replacing all the variables for a start.
– Scott
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How to manually deprecate members
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Starting Swift 3 and Swift 4, the version number is optional. You can now simply type:
@available(*, deprecated)
func foo() {
// ...
}
Or if you want a message go along with it:
@available(*, deprecated, message: "no...
Python int to binary string?
...here the string is right-justified within that block, and an offset to its starting character. To prefix a character, you would then simply reduce the offset and store the character there. Yes, that would be esoteric but it makes little sense to me to argue about possible real-world issues with a bi...
How to initialize HashSet values by construction?
... @Natix For 2 elements it is more verbose, but this representation starts becoming concise if you have to hard code the set with more elements(10-100s)
– Schleir
Jul 11 '17 at 23:00
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Running python script inside ipython
...odules can be imported but scripts are not found by the interpreter unless started from the directory they belong to.
– Tyler Durden
Jul 31 '12 at 17:59
1
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View all TODO items in Visual Studio using GhostDoc
...oh yea, I always read the comment. half the time I modify but it helps me start out so I love it. I think VS has a simplar auto gen XML comments too? I just like the stubbing out of the XML comment structure and Ghostdoc does help a lot with the text ..but yea you do have to modify it if it does...