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In Java 8 how do I transform a Map to another Map using a lambda?
... on the originalColumnMap, so the function Column::new is reevaluated each time the entry is accessed (which may not be desirable when the mapping function is expensive)
– Erric
Nov 11 '19 at 11:57
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Batch file to delete files older than N days
...ersion of a poor man's Linux epoch replacement limited for daily usage (no time retention):
7daysclean.cmd
@echo off
setlocal ENABLEDELAYEDEXPANSION
set day=86400
set /a year=day*365
set /a strip=day*7
set dSource=C:\temp
call :epoch %date%
set /a slice=epoch-strip
for /f "delims=" %%f in ('dir ...
Java Timestamp - How can I create a Timestamp with the date 23/09/2007?
How can I create a Timestamp with the date 23/09/2007?
8 Answers
8
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How to mock an import
...ects
Addendum: Actually, I needed to simulate a side-effect that took some time. So I needed an object's method to sleep for a second. That would work like this:
sys.modules['foo'] = MagicMock()
sys.modules['foo.bar'] = MagicMock()
sys.modules['foo.baz'] = MagicMock()
# setup the side-effect:
from t...
List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
...ew_list = my_list , any modifications to new_list changes my_list everytime. Why is this, and how can I clone or copy the list to prevent it?
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Why use Ruby instead of Smalltalk? [closed]
...deserved) reputation for being difficult to learn; it takes quite a bit of time and effort to become a really proficient Smalltalk programmer. Ruby and Python are much easier to learn and to bring new programmers up to speed with.
Historically, mainstream Smalltalk implementations were quite expens...
How to convert nanoseconds to seconds using the TimeUnit enum?
...
Well, you could just divide by 1,000,000,000:
long elapsedTime = end - start;
double seconds = (double)elapsedTime / 1_000_000_000.0;
If you use TimeUnit to convert, you'll get your result as a long, so you'll lose decimal precision but maintain whole number precision.
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set DateTime to start of month
How can I set a DateTime to the first of the month in C#?
9 Answers
9
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Find all packages installed with easy_install/pip?
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list and freeze output different formats (as of the time of writing). The freeze output can be used to recreate environments: docs.python-guide.org/en/latest/dev/virtualenvs/#other-notes
– Tom Saleeba
Feb 19 '16 at 1:47
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I want to delete all bin and obj folders to force all projects to rebuild everything
...or 'obj' that way I am sure that all projects will rebuild everything (sometimes it's the only way to force Visual Studio to forget all about previous builds).
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