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pod install -bash: pod: command not found
I installed pod some time ago. However, it's stopped working so I'm working through this again.
21 Answers
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Get a random item from a JavaScript array [duplicate]
How do I get random item from items ?
13 Answers
13
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How to update a value, given a key in a hashmap?
Suppose we have a HashMap<String, Integer> in Java.
17 Answers
17
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JavaScript seconds to time string with format hh:mm:ss
I want to convert a duration of time, i.e., number of seconds to colon-separated time string (hh:mm:ss)
43 Answers
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初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
初窥InnoDB的Memcached插件前些年，HandlerSocket的横空出世让人们眼前一亮，当时我还写了一篇文章介绍了其用法梗概，时至今日，由于种种原因，HandlerSocket并没有真...前些年，HandlerSocket的横空出世让人们眼前一亮，当时我还写了一...
Ruby: Calling class method from instance
In Ruby, how do you call a class method from one of that class's instances? Say I have
9 Answers
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Why isn't std::initializer_list a language built-in?
It seems to me that it's quite an important feature of C++11 and yet it doesn't have its own reserved keyword (or something alike).
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How to split a delimited string in Ruby and convert it to an array?
I have a string
5 Answers
5
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How to check whether a pandas DataFrame is empty?
...# This data manipulation approach results in an empty df
# because of a subset of values that are not available (`NaN`)
In [2]: df = df[df['AA'] == 5]
df
Out[2]: Empty DataFrame
Columns: [AA, BB]
Index: []
# NOTE: the df is empty, BUT the columns are persistent
In [3]: len(d...
Is Java really slow?
... likely consider Java fast.
If you do numerical computation on large data sets, or are bound to an execution environment, where CPU resources are limited, where a constant speedup in the scale of 5-10 would be huge. Even a 0.5 speed up might mean a 500 hour reduction for the computation to complete...