syntax Archives - Page 3 of 15

javascript, Programming

IT Nursery

What does a tilde do when it precedes an expression?

var attr = ~'input,textarea'.indexOf( target.tagName.toLowerCase() ) ? 'value' : 'innerHTML' I saw it in an answer, and I’ve never seen it before. What ...

May 27, 2022
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Programming, ruby

IT Nursery

Correct way to populate an Array with a Range in Ruby

I am working through a book which gives examples of Ranges being converted to equivalent arrays using their “to_a” methods When i run ...

May 27, 2022
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bash, Programming

IT Nursery

Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]

I’ve seen Bash scripts test for a non-zero length string in two different ways. Most scripts use the -n option: #!/bin/bash # With ...

May 26, 2022
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Java method with return type compiles without return statement

Question 1: Why does the following code compile without having a return statement? public int a() { while(true); } Notice: If I add ...

May 25, 2022
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What do you call the -> operator in Ruby?

What do you call the -> operator as in the following? ->(...) do ... end Aren’t the following snippets equivalent? succ = ->(x) ...

May 25, 2022
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What is the benefit of using $() instead of backticks in shell scripts? [duplicate]

This question already has answers here: What is the difference between $(command) and `command` in shell programming? (6 answers) Closed 3 months ago. ...

May 25, 2022
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Shell script “for” loop syntax

I have gotten the following to work: for i in {2..10} do echo "output: $i" done It produces a bunch of lines of ...

May 24, 2022
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JavaScript error (Uncaught SyntaxError: Unexpected end of input)

I have some JavaScript code that works in FireFox but not in Chrome or IE. In the Chrome JS Console I get the ...

May 24, 2022
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Dynamic variable names in Bash

I am confused about a bash script. I have the following code: function grep_search() { magic_way_to_define_magic_variable_$1=`ls | tail -1` echo $magic_variable_$1 } I ...

May 24, 2022
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ASP.NET “special” tags

What is the official name for the “special” ASP.NET tags like this: <%# %> <%= %> <%@ %> <%$ %> I can’t seem ...

May 23, 2022
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