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What's faster, SELECT DISTINCT or GROUP BY in MySQL?
...cit, so you can get away with a slightly dumber optimizer.
When in doubt, test!
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How to get arguments with flags in Bash
...
This is the idiom I usually use:
while test $# -gt 0; do
case "$1" in
-h|--help)
echo "$package - attempt to capture frames"
echo " "
echo "$package [options] application [arguments]"
echo " "
echo "options:"
echo "-h, --h...
How do you detect Credit card type based on number?
...1|1800|35\d{3})\d{11}$/
}
for(var key in re) {
if(re[key].test(number)) {
return key
}
}
}
Unit test:
describe('CreditCard', function() {
describe('#detectCardType', function() {
var cards = {
'8800000000000000': 'UNIONPAY',
...
TextView.setTextSize behaves abnormally - How to set text size of textview dynamically for different
...swer, as also ran into a bit of confusion. You should be able to drop this test into any @RunWith(AndroidJUnit4.class) test you have in your project (you'll also need to add the dimens to your dimens.xml).
Note: All these tests pass
@Test public void testScaledFontSizes() {
if (Build.VERSION.SDK...
unix diff side-to-side results?
...y, --side-by-side
output in two columns
Hence, say:
diff -y /tmp/test1 /tmp/test2
Test
$ cat a $ cat b
hello hello
my name my name
is me is you
Let's compare them:
$ diff -y a b
hello ...
Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?
...
You can use Qemu to test assignments quickly. This procedure below takes less than 5 seconds on my 5 year old laptop.
Let's assume the student has to develop a program that takes unsigned ints, each on their own line, until a line with "-1" arr...
Using Regular Expressions to Extract a Value in Java
.../ create matcher for pattern p and given string
Matcher m = p.matcher("Testing123Testing");
// if an occurrence if a pattern was found in a given string...
if (m.find()) {
// ...then you can use group() methods.
System.out.println(m.group(0)); // whole matched expression...
Using XPATH to search text containing
...d.
We use the same normalization logic on
the text of HTML Selenese test case
tables. This has a number of
advantages. First, you don't need to
look at the HTML source of the page to
figure out what your assertions should
be; " " symbols are invisible
to the end user, and...
$_POST vs. $_SERVER['REQUEST_METHOD'] == 'POST'
... POST data.
I check the request method — I actually never thought about testing the $_POST array. I check the required post fields, though. So an empty post request would give the user a lot of error messages - which makes sense to me.
...
Is there a way to create a function from a string with javascript?
...
I added a jsperf test for 4 different ways to create a function from string :
Using RegExp with Function class
var func = "function (a, b) { return a + b; }".parseFunction();
Using Function class with "return"
var func = new Function("re...