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string.Join on a List or other type
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A typical optimization is to append the delimiter without testing, then remove the last character once you get out of the loop.
– Steven Sudit
Aug 31 '10 at 16:15
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How do I write stderr to a file while using “tee” with a pipe?
...understand what you want to do or what the problem is you're having. echo test; exit doesn't produce any output on stdout, so err will remain empty.
– lhunath
Aug 25 '13 at 0:46
1...
Couldn't register with the bootstrap Server
...the hang when using the simulator, look at this thread: Strange Error When Testing Simulator
You may find this test of interest, as it will tell you ASAP if the only solution is to reboot now or not:
Open Terminal and run this command: ps -Ael | grep Z. If you get two entries, one "(clang)" and th...
Find the min/max element of an Array in JavaScript
...y work on strings. Your future colleague tries to get the alphabetically-latest string in an array with the now-well-documented native .max() method, but mysteriously gets NaN. Hours later, she finds this code, runs a git blame, and curses your name.
– Mark Amery
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What is uintptr_t data type
...add one very good use for uintptr_t (or even intptr_t) and that is writing testable embedded code.
I write mostly embedded code targeted at various arm and currently tensilica processors. These have various native bus width and the tensilica is actually a Harvard architecture with separate code and...
#ifdef #ifndef in Java
...output class file. For example, consider the following code:
public class Test
{
private static final boolean debug = false;
public static void main(String[] args)
{
if (debug)
{
System.out.println("debug was enabled");
}
else
{
Sy...
How to mark a build unstable in Jenkins when running shell scripts
...d some are PHP scripts. One of the PHP scripts is running some integration tests that output to JUnit XML, code coverage reports, and similar.
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Removing a list of characters in string
...ne for c in chars_to_remove}
>>> subj.translate(dd)
u'ABC'
Full testing code and timings:
#coding=utf8
import re
def remove_chars_iter(subj, chars):
sc = set(chars)
return ''.join([c for c in subj if c not in sc])
def remove_chars_re(subj, chars):
return re.sub('[' + re.es...
javax.validation.ValidationException: HV000183: Unable to load 'javax.el.ExpressionFactory'
...
If you are using tomcat as your server runtime and you get this error in tests (because tomcat runtime is not available during tests) than it makes make sense to include tomcat el runtime instead of the one from glassfish). This would be:
<dependency>
<groupId>org.apache.t...
When to use static vs instantiated classes
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One thing about static methods/classes is that they don't facilitate unit testing (at least in PHP, but probably in other languages too).
Another thing about static data is that only one instance of it exists in your program : if you set MyClass::$myData to some value somewhere, it'll have this va...