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How do I merge a list of dicts into a single dict?
...)[0] for i in L)
{'a': 1, 'c': 1, 'b': 2, 'd': 2}
Note: the order of 'b' and 'c' doesn't match your output because dicts are unordered
if the dicts can have more than one key/value
>>> dict(j for i in L for j in i.items())
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How to determine MIME type of file in android?
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First and foremost, you should consider calling MimeTypeMap#getMimeTypeFromExtension(), like this:
// url = file path or whatever suitable URL you want.
public static String getMimeType(String url) {
String type = null;
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Date only from TextBoxFor()
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Yes, as now there is the EditorFor helper and MVC2 is finalized, your solution is the way to go
– Kronos
Nov 8 '10 at 15:03
67
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Define: What is a HashSet?
... HashSet holds a set of objects, but in a way that it allows you to easily and quickly determine whether an object is already in the set or not. It does so by internally managing an array and storing the object using an index which is calculated from the hashcode of the object. Take a look here
Hash...
Import text file as single character string
...king at this question 3 years later, Hadley Wickham's readr package has a handy read_file() function that will do this for you.
install.packages("readr") # you only need to do this one time on your system
library(readr)
mystring <- read_file("path/to/myfile.txt")
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grep using a character vector with multiple patterns
... test whether a vector of strings are present in an another vector or not, and to output the values that are present (the matching patterns).
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Java 8 List into Map
I want to translate a List of objects into a Map using Java 8's streams and lambdas.
21 Answers
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How do I check whether a jQuery element is in the DOM?
... There is a pure-DOM way to do this, which is syntactically more readable, and I imagine very similar in terms of performance: document.contains($foo[0])
– Joel Cross
Dec 1 '15 at 10:16
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Remove array element based on object property
... answered Mar 8 '13 at 6:19
jAndyjAndy
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How do you Force Garbage Collection from the Shell?
So I am looking at a heap with jmap on a remote box and I want to force garbage collection on it. How do you do this without popping into jvisualvm or jconsole and friends?
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