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Named placeholders in string formatting
...
formatPos = "%" + Integer.toString(currentPos) + "$";
int index = -1;
while ((index = convFormat.indexOf(formatKey, index)) != -1) {
convFormat.replace(index, index + formatKey.length(), formatPos);
index += formatPos.length();
}
value...
Python list subtraction operation
...ting and using bisect:
ys = sorted(y)
def bisect_contains(seq, item):
index = bisect.bisect(seq, item)
return index < len(seq) and seq[index] == item
[item for item in x if bisect_contains(ys, item)]
If your items are neither hashable nor comparable, then you're stuck with the quadra...
What's better to use in PHP, $array[] = $value or array_push($array, $value)?
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No benchmarks, but I personally feel like $array[] is cleaner to look at, and honestly splitting hairs over milliseconds is pretty irrelevant unless you plan on appending hundreds of thousands of strings to your array.
Edit: Ran this code:
$t = microti...
How to find first element of array matching a boolean condition in JavaScript?
...eturn whether the condition was met once, not by which element (or at what index) it was met. So we have to amend it a little:
function find(arr, test, ctx) {
var result = null;
arr.some(function(el, i) {
return test.call(ctx, el, i, arr) ? ((result = el), true) : false;
});
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What is the $$hashKey added to my JSON.stringify result
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If you don't want to add id's to your data, you could track by the index in the array, which will cause the items to be keyed by their position in the array instead of their value.
Like this:
var myArray = [1,1,1,1,1];
<li ng-repeat="item in myArray track by $index">
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Case insensitive replace
...replace(old, new, text):
idx = 0
while idx < len(text):
index_l = text.lower().find(old.lower(), idx)
if index_l == -1:
return text
text = text[:index_l] + new + text[index_l + len(old):]
idx = index_l + len(new)
return text
...
New line in JavaScript alert box
... Why is this answer underrated? if your are thinking way more dynamically in terms of programming webpages this is a big help.
– Jimwel Anobong
Oct 25 '17 at 12:59
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Using node.js as a simple web server
... a very simple HTTP server. Every GET request to example.com should get index.html served to it but as a regular HTML page (i.e., same experience as when you read normal web pages).
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Mail multipart/alternative vs multipart/mixed
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I hit this challenge today and I found these answers useful but not quite explicit enough for me.
Edit: Just found the Apache Commons Email that wraps this up nicely, meaning you don't need to know below.
If your requirement is an emai...
Render basic HTML view?
... ground using Express framework. I have a views folder where I have an index.html file. But I receive the following error when loading the web browser.
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