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How to use comments in Handlebar templates?
...andlebar.js as my templating engine. Now I want to comment out some of the blocks in my handlebar templates. But then I realized that Handlebar doesn't ignore the expressions inside the Handlebar comment block. Any workaround for this?
...
Rails 3: “field-with-errors” wrapper changes the page appearance. How to avoid this?
...visual difference you are seeing is happening because the div element is a block element. Add this style to your CSS file to make it behave like an inline element:
.field_with_errors { display: inline; }
share
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How to map and remove nil values in Ruby
...er_map { |i| i * 2 if i.even? }
# => [4, 16, 20]
In your case, as the block evaluates to falsey, simply:
items.filter_map { |x| process_x url }
"Ruby 2.7 adds Enumerable#filter_map" is a good read on the subject, with some performance benchmarks against some of the earlier approaches to this...
Using margin:auto to vertically-align a div
...swer.
You can't use:
vertical-align:middle because it's not applicable to block-level elements
margin-top:auto and margin-bottom:auto because their used values would compute as zero
margin-top:-50% because percentage-based margin values are calculated relative to the width of containing block
In f...
What is the Ruby (spaceship) operator?
... operator most likely originated, it was used mainly to simplify the "sort BLOCK LIST" syntax. The BLOCK is a subroutine that can return any positive number, negative number, or 0 depending on how the list items should be sorted. Spaceship operator is convenient to use in the block.
...
How to create a directory if it doesn't exist using Node.js?
... performing this operation on app boot or initialization, then its fine to block execution as you'd do the same thing if you were to do it async. If you're making a directory as a recurring operation then its bad practice but probably won't cause any performance issue, but its a bad habbit none-the-...
Choose between ExecutorService's submit and ExecutorService's execute
...n in the framework itself unless you embed your task code in try{} catch{} block.
Example code: This code swallows Arithmetic exception : / by zero.
import java.util.concurrent.*;
import java.util.*;
public class ExecuteSubmitDemo{
public ExecuteSubmitDemo()
{
System.out.println("...
What's the point of NSAssert, actually?
...
Note that XCode 4 has NS_BLOCK_ASSERTIONS defined by default in release configurations. I guess if you don't change that your released code will not contain NSAssert:s.
– Jonny
Nov 29 '11 at 2:52
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What is the use of the pipe symbol in YAML?
...s a tricky one: It's because indentation should be relative to the current block-level element. So in this case it should be 4+ instead of 6+ because the last block-level element is the array item (specified by -) and the literal is indented 4 from it. Somewhat surprisingly the final: | mapping is...
Why are there two kinds of functions in Elixir?
...hile.
And in elixir, it is just this extra dot, whereas in ruby you have blocks on top of this. Blocks are amazing and I am surprised how much you can do with just blocks, but they only work when you need just one anonymous function which is the last argument. Then since you should be able to deal...