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Most efficient way to prepend a value to an array
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You didnt mention abt the time taken compared to unshift
– Shashank Vivek
Aug 17 '18 at 9:19
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Installing R on Mac - Warning messages: Setting LC_CTYPE failed, using “C”
...ATE="C"
LC_CTYPE="UTF-8"
LC_MESSAGES="C"
LC_MONETARY="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_ALL=
Edit ~/.profile or ~/.bashrc
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8
Run . ~/.profile or . ~/.bashrc to read from the file.
Open a new terminal window and check that the locales are properly set
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Jenkins Host key verification failed
...destinationuser@destinationhostname
It will prompt like this for the first time, say yes and it will also ask password for the first time:
The authenticity of host 'sample.org (205.214.640.91)' can't be established.
RSA key fingerprint is 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40.
Are you sur...
Test if a string contains any of the strings from an array
...portant: the above code can be done using parallelStream() but most of the time this will actually hinder performance. See this question for more details on parallel streaming.
Original slightly dated answer:
Here is a (VERY BASIC) static method. Note that it is case sensitive on the comparison str...
Scoping in Python 'for' loops
...meiterator, start=1):
dosomething(count, x)
print "I did something {0} times".format(count)
Is this necessary? No. But, it sure is convenient.
Another thing to be aware of: in Python 2, variables in list comprehensions are leaked as well:
>>> [x**2 for x in range(10)]
[0, 1, 4, 9, ...
How to create a new object instance from a Type
One may not always know the Type of an object at compile-time, but may need to create an instance of the Type .
12 Ans...
How can I use pickle to save a dict?
...on 2, using the default protocol (0) is not only incredibly inefficient on time and space, but it can't actually handle many things that protocol 2+ handles just fine (e.g. new-style classes that use __slots__). I'm not saying you should always use HIGHEST_PROTOCOL, but ensuring you don't use protoc...
Retrieve database or any other file from the Internal Storage using run-as
...mefile > somefile to extract a single file. But you have to do multiple times for multiple files. Here is a simple script I use to extract the directory.
#!/bin/bash
P=
F=
D=
function usage()
{
echo "$(basename $0) [-f file] [-d directory] -p package"
exit 1
}
while getopts ":p:f:d:" o...
OPTION (RECOMPILE) is Always Faster; Why?
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There are times that using OPTION(RECOMPILE) makes sense. In my experience the only time this is a viable option is when you are using dynamic SQL. Before you explore whether this makes sense in your situation I would recommend rebui...
Undefined method 'task' using Rake 0.9.0
...71169
There should be a 3.0.8 release soon that fixes it. In the mean time, you can add the following line to your Gemfile:
gem 'rake', '~> 0.8.7'
It's a problem in Rake (0.9.0), it was announced by DHH on Twitter.
Rake 0.9, which was released yesterday, broke Rails (and others)....