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StringBuilder vs String concatenation in toString() in Java
Given the 2 toString() implementations below, which one is preferred:
18 Answers
18
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vertical-align with Bootstrap 3
...er {
display: inline-block;
vertical-align: middle;
float: none;
}
<div class="row">
<div class="col-xs-5 col-md-3 col-lg-1 vcenter">
<div style="height:10em;border:1px solid #000">Big</div>
</div><!--
--><div class="col...
Undefined behavior and sequence points
...tors indicated are the built-in operators, as described in clause 5. When one of these operators is overloaded (clause 13) in a valid context, thus designating a user-defined operator function, the expression designates a function invocation and the operands form an argument list, without an implie...
How to shorten my conditional statements
...or the result in the first column. All other columns to the left have only one row with a 1, so the 1 carried over from the previous column will again add up to 2, which will then carry over... This process repeats itself till we get to the left-most column, where the 1 to be carried over has nowher...
Python Flask, how to set content type
...n I did it, I ended up with two Content-Type headers in response - default one and added one.
– omikron
Feb 2 '17 at 16:15
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How to randomly select an item from a list?
...
If you want to randomly select more than one item from a list, or select an item from a set, I'd recommend using random.sample instead.
import random
group_of_items = {1, 2, 3, 4} # a sequence or set will work here.
num_to_select = 2 ...
Why aren't variable-length arrays part of the C++ standard?
...but it is not quite the same, as it uses dynamic memory, and making it use one's own stack-allocator isn't exactly easy (alignment is an issue, too). It also doesn't solve the same problem, because a vector is a resizable container, whereas VLAs are fixed-size. The C++ Dynamic Array proposal is inte...
Why am I not getting a java.util.ConcurrentModificationException in this example?
...own remove or add methods, the iterator will throw a
ConcurrentModificationException.
This check is done in the next() method of the iterator (as you can see by the stacktrace). But we will reach the next() method only if hasNext() delivered true, which is what is called by the for each to check...
Get the first item from an iterable that matches a condition
...xt(x for x in the_iterable if x > 3)
If you want default_value (e.g. None) to be returned instead:
next((x for x in the_iterable if x > 3), default_value)
Note that you need an extra pair of parentheses around the generator expression in this case − they are needed whenever the generato...
How to “pull” from a local branch into another one?
...rom the local repository instead of the origin repository. No fetching is done (because everything from the local repository is already here!). There's no advantage – both commands do more or less the same. If you are doing fast-forwards, you could use push . origin/branch:branch (not pull) to upd...