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How to remove array element in mongodb?
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242
Try the following query:
collection.update(
{ _id: id },
{ $pull: { 'contact.phone': { nu...
ctypes - Beginner
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229
Here's a quick and dirty ctypes tutorial.
First, write your C library. Here's a simple Hello w...
ARC and bridged cast
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215
I agree that the description is confusing. Since I just grasped them, I'll try to summarize:
...
How to only find files in a given directory, and ignore subdirectories using bash
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205
If you just want to limit the find to the first level you can do:
find /dev -maxdepth 1 -nam...
What's the difference between IEquatable and just overriding Object.Equals()?
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217
The main reason is performance. When generics were introduced in .NET 2.0 they were able to ad...
What is hashCode used for? Is it unique?
...the Hashtable object is constructed. Prior to the .NET Framework
version 2.0, the hash code provider was based on the
System.Collections.IHashCodeProvider interface. Starting with version
2.0, the hash code provider is based on the
System.Collections.IEqualityComparer interface.
Basically,...
How does Chrome's “Request Desktop Site” option work?
...y Nexus Build/IMM76K) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Mobile Safari/535.19
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.45 Safari/535.19
Notice the word "Mobile' in the first one, and also the mention of Android system and dev...
Does Flask support regular expressions in its URL routing?
...p.run(debug=True, host='0.0.0.0', port=5000)
this URL should return with 200: http://localhost:5000/abc0-foo/
this URL should will return with 404: http://localhost:5000/abcd-foo/
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Split delimited strings in a column and insert as new rows [duplicate]
...is another way of doing it..
df <- read.table(textConnection("1|a,b,c\n2|a,c\n3|b,d\n4|e,f"), header = F, sep = "|", stringsAsFactors = F)
df
## V1 V2
## 1 1 a,b,c
## 2 2 a,c
## 3 3 b,d
## 4 4 e,f
s <- strsplit(df$V2, split = ",")
data.frame(V1 = rep(df$V1, sapply(s, length))...
Homebrew install specific version of formula?
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