Recent questions tagged Syntax

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syntax - Are PHP keywords case-sensitive?

For example, is the following program meaningful, and if so what should it print? <?php FuncTIon fOo($x) { ... interpreter appears to tell me! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - Why does Java not have block-scoped variable declarations?

The following method does not work because the inner block declares a variable of the same name as one in the ... language-design classes. :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - Why do you need to append an L or F after a value assigned to a C++ constant?

I have looked at quite a few places online and can't seem to find a good explanation as to why we should append an ... // no 'L' appended Whew! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - What's the difference between "LIKE" and "=" in SQL?

Is there any difference between: SELECT * FROM users WHERE username="davyjones" and SELECT * FROM users WHERE username LIKE "davyjones" See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - Ruby 1.9 hash with a dash in a key

In ruby 1.9 is there a way to define this hash with the new syntax? irb> { a: 2 } => {:a=>2} irb> { a-b: 2 } ... -b" => 2 } => {:"a-b"=>2} See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - What's the meaning of `()` in git command SYNOPSIS?

In the synopsis of git reset: 'git reset' (--patch | -p) [<tree-ish>] [--] [<paths>...] ... t find relative clues in POSIX Utility Conventions. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - Which characters can I omit in Scala?

In Scala, why can I omit the dot and brakets in T m 0 (instead of T.m(0)) in the following? scala> ... expected but integer literal found. n 0 ^ See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - How to break out of 2 loops without a flag variable in C#?

As a trivial example lets say I have the following grid and I am looking for a particular cells value. When ... just seems too verbose. Thanks, See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - What does x mean in C/C++?

Example: char arr[] = "xebx2a"; BTW, are the following the same? "xebx2a" vs. 'xebx2a' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - Java Lombok: Omitting one field in @AllArgsConstructor?

If I specify @AllArgsConstructor using Lombok, it will generate a constructor for setting all the declared (not final ... for all other fields? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - What do parentheses in a C variable declaration mean?

Can someone explain what this means? int (*data[2])[2]; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - Python def function: How do you specify the end of the function?

I'm just learning python and confused when a "def" of a function ends? I see code samples like: def ... lead to some interesting errors. Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - What's the syntactically proper way to declare a C struct?

I've seen C structs declared several different ways before. Why is that and what, if anything, does each do different? ... ; baz c; return 0; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - C++ const keyword - use liberally?

In the following C++ functions: void MyFunction(int age, House &purchased_house) { ... } void MyFunction(const int ... of the above are better? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax error - What is unexpected T_VARIABLE in PHP?

I get this PHP error: Parse error: syntax error, unexpected T_VARIABLE From this line: $list[$i][$docinfo[' ... anything wrong with this line? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - 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" ... an array with a Range? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - What is a regular language?

I'm trying to understand the concept of languages levels (regular, context free, context sensitive, etc.). I ... language be "over" anything? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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753 views

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syntax - Why doesn't Tcl use a dollar sign before variable names when calling "set"?

I am just going to use Perl as a comparison here: $foo = 5; print $foo; sets the variable $foo to 5, and then ... because I'm used to Python...) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - Is there a goto statement in Java?

I'm confused about this. Most of us have been told that there isn't any goto statement in Java. But I found ... included in Java as a keyword? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - C fundamentals: double variable not equal to double expression?

I am working with an array of doubles called indata (in the heap, allocated with malloc), and a local double ... prior to a conditional? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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599 views

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syntax - + operator before expression in javascript: what does it do?

I was perusing the underscore.js library and I found something I haven't come across before: if (obj.length === + ... to that part of the file. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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449 views

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syntax - Is C++ context-free or context-sensitive?

I often hear claims that C++ is a context-sensitive language. Take the following example: a b(c); Is ... + context-free or context-sensitive? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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718 views

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syntax - What do square brackets around an identifier in VB.NET signify?

I'm quite familiar with VB and .NET in general, but I just ran across this code: Me.[GetType]() ... purpose of the brackets around GetType? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - Why is the semicolon optional in the last statement in php?

I was surprised when I ran the following code in my editor: <?php echo "hello"; echo "world" ?> As it can be ... and why ; is {0,1} here?. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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syntax - What is the meaning of & in c++?

I want to know the meaning of & in the example below: class1 &class1::instance(){ ///something to do } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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690 views

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syntax - Double dollar sign php

Possible Duplicate: What does $$ (dollar dollar or double dollar) mean in PHP? I found myself using this ... of overriding local variables. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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635 views

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syntax - Converting decimal to binary in Java

I'm trying to write a code that converts a number to binary, and this is what I wrote. It gives me ... token "mod", invalid AssignmentOperator. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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889 views

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syntax - Javascript history.PushState not working?

I have this code here: <script type="text/javascript"> function goFunction(){ history.pushState("google.ca", ... reference something? Thanks, J See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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