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adding multiple entries to a HashMap at once in one statement
... 2016) as follow:
Map<String, Integer> cities = Map.of("Brussels", 1_139000, "Cardiff", 341_000);
The var-args case for Map is a little bit harder, you need to have both keys and values, but in Java, methods can’t have two var-args parameters. So the general case is handled by taking a va...
Create a .csv file with values from a Python list
...th open(..., 'wb') as myfile:
wr = csv.writer(myfile, quoting=csv.QUOTE_ALL)
wr.writerow(mylist)
Edit: this only works with python 2.x.
To make it work with python 3.x replace wb with w (see this SO answer)
with open(..., 'w', newline='') as myfile:
wr = csv.writer(myfile, quoting=c...
How to find the sum of an array of numbers
...MAScript 6), it can be this pretty:
const sum = [1, 2, 3].reduce((partial_sum, a) => partial_sum + a,0);
console.log(sum); // 6
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How do I update Ruby Gems from behind a Proxy (ISA-NTLM)
...e command-line switch but I have been able to do it just by setting my HTTP_PROXY environment variable. (Note that case seems to be important). I have a batch file that has a line like this in it:
SET HTTP_PROXY=http://%USER%:%PASSWORD%@%SERVER%:%PORT%
I set the four referenced variables before I...
Reusable library to get human readable version of file size?
...o require a library" issue by a straightforward implementation:
def sizeof_fmt(num, suffix='B'):
for unit in ['','Ki','Mi','Gi','Ti','Pi','Ei','Zi']:
if abs(num) < 1024.0:
return "%3.1f%s%s" % (num, unit, suffix)
num /= 1024.0
return "%.1f%s%s" % (num, 'Yi', s...
How to programmatically determine the current checked out Git branch [duplicate]
...ek at contrib/completions/git-completion.bash does that for bash prompt in __git_ps1. Removing all extras like selecting how to describe detached HEAD situation, i.e. when we are on unnamed branch, it is:
branch_name="$(git symbolic-ref HEAD 2>/dev/null)" ||
branch_name="(unnamed branch)" #...
How to return 2 values from a Java method?
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You can use SimpleEntry<type_of_value_1, type_of_value_2> from java.util.AbstractMap.SimpleEntry and use it with getKey() to get object 1 and getValue() to get object 2
– Crystalonics
Apr 28 '16 at 18:03
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How to list the tables in a SQLite database file that was opened with ATTACH?
...r" functions don't look into ATTACHed databases: they just query the SQLITE_MASTER table for the "main" database. Consequently, if you used
ATTACH some_file.db AS my_db;
then you need to do
SELECT name FROM my_db.sqlite_master WHERE type='table';
Note that temporary tables don't show up with ....
Difference between Java Enumeration and Iterator
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@Paul_Draper: Edits should not be adding new meaning to the post, that is what comments are for.
– Emil
Nov 11 '12 at 17:40
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MFC RadioButton用法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...件定义Control变量或Value变量，每组只能定义一个）
BOOL m_Radio1;//对应于组 1 1
BOOL m_Radio3; //对应于组 2 1
BOOL m_Radio7; //对应于组 3 1
BOOL m_Radio9; //对应于组 4 1
CButton m_RBtGroup1; //对应于组 1 1
CButton m_RBtGroup2;...