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Is Java Regex Thread Safe?
I have a function that uses Pattern#compile and a Matcher to search a list of strings for a pattern.
5 Answers
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How to get current time and date in C++?
Is there a cross-platform way to get the current date and time in C++?
24 Answers
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How do I find out what keystore my JVM is using?
...les---> JAVA_HOME
Your server startup batch files.
In your import command -keystore cacerts (give full path to the above JRE here instead of just saying cacerts).
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Member initialization while using delegated constructor
I've started trying out the C++11 standard and i found this question which describes how to call your ctor from another ctor in the same class to avoid having a init method or the like. Now i'm trying the same thing with code that looks like this:
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What is the difference between print and puts?
For example in this line of code I wrote, print and puts produce different results.
6 Answers
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How to generate keyboard events in Python?
...(1, ctypes.byref(x), ctypes.sizeof(x))
def AltTab():
"""Press Alt+Tab and hold Alt key for 2 seconds
in order to see the overlay.
"""
PressKey(VK_MENU) # Alt
PressKey(VK_TAB) # Tab
ReleaseKey(VK_TAB) # Tab~
time.sleep(2)
ReleaseKey(VK_MENU) # Alt~
if __name__ ...
How to get milliseconds from LocalDateTime in Java 8
...r, maybe you already have a LocalDateTime or similar object from somewhere and you want to convert it to milliseconds since the epoch. It's not possible to do that directly, since the LocalDateTime family of objects has no notion of what time zone they're in. Thus time zone information needs to be s...
How to reload a clojure file in REPL
...ong in the OP's dev environment because for a single file the two (:reload and :reload-all) should have the same effect. Here's the full command for :reload-all: (use 'your.namespace :reload-all) This reloads all the dependencies, too.
– Jason
Feb 19 '16 at 1...
Error while installing json gem 'mkmf.rb can't find header files for ruby'
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For Xcode 11 on macOS 10.14, this can happen even after installing Xcode and installing command-line tools and accepting the license with
sudo xcode-select --install
sudo xcodebuild -license accept
The issue is that Xcode 11 ships the macOS 10.15 SDK which includes headers for ruby2.6, but no...
How to do a FULL OUTER JOIN in MySQL?
...oducing duplicate rows by using an anti-join pattern for the second query, and then use a UNION ALL set operator to combine the two sets. In the more general case, where a FULL OUTER JOIN would return duplicate rows, we can do this:
SELECT * FROM t1
LEFT JOIN t2 ON t1.id = t2.id
UNION ALL
SELECT * ...