Recent questions tagged Syntax

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syntax - Python boolean expression and or

In python if you write something like foo==bar and spam or eggs python appears to return spam if the boolean ... the result of the expression. 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 highlighting - Visual Studio 2015 RTM - Lost JavaScript support after update TypeScript Tools

I have lost the support for JavaScript files inside Visual Studio 2015 after updating the TypeScript tools from ... solution for this problem? 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 - Are there binary literals in Java?

I want to declare my integer number by a binary literal. Is it possible in Java? See Question&Answers more detail:os...

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

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592 views

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syntax - PHP - Returning the last line in a file?

I'm guessing it's fgets, but I can't find the specific syntax. I'm trying to read out (in a string I'm ... the last line added to a log 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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syntax - How to tell if a string contains valid Python code

If I have a string of Python code, how do I tell if it is valid, i.e., if entered at the Python ... execute the code, just check its syntax. See Question&Answers more detail:os...

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

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744 views

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syntax - Double Underscore in PHP?

What does the double underscores in these lines of PHP code mean? $WPLD_Trans['Yes']=__('Yes',$WPLD_Domain); ... ]=__('No',$WPLD_Domain); See Question&Answers more detail:os...

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

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477 views

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syntax - What is "?:" notation in JavaScript?

I found this snippet of code in my travels in researching JSON: var array = typeof objArray != 'object' ? JSON.parse ... I know what != means). See Question&Answers more detail:os...

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

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579 views

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syntax - What does a backslash in C++ mean?

What does this code: (especially, what does a backslash '' ? ) s23_foo += s8_foo * s16_bar; I added the ... be relevant. Thanks for your help. See Question&Answers more detail:os...

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

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649 views

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syntax - Why PHP variables start with a $ sign symbol?

Has anybody ever thought about this question. Why we must write $var_name = value; and not var_name = value;? Yes I ... is it a $ sign symbol? See Question&Answers more detail:os...

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

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563 views

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syntax - Why doesn't C have binary literals?

I am frequently wishing I could do something like this in c: val1 &= 0b00001111; //clear high nibble val2 |= ... to make a 32 bit mask. See Question&Answers more detail:os...

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

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454 views

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syntax - Why is declaration of the variable required inside a for-each loop in java

The usual form the of for each loop is this: for(Foo bar: bars){ bar.doThings(); } But if I want to retain bar ... for(;;){ // Do things } } See Question&Answers more detail:os...

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

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510 views

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syntax - How to include a quote in a raw Python string

Consider: >>> r"what"ever" SyntaxError: invalid syntax >>> r"what"ever" 'what"ever' So how do we get ... include both types of quotes? Related See Question&Answers more detail:os...

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

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557 views

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syntax - What are some example use cases for symbol literals in Scala?

The use of symbol literals is not immediately clear from what I've read up on Scala. Would anyone care ... 'HelloWorld vs "HelloWorld"? 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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582 views

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syntax - Automatic counter in Ruby for each?

I want to use a for-each and a counter: i=0 for blah in blahs puts i.to_s + " " + blah i+=1 end Is ... #{blah}" which is a lot more succinct. See Question&Answers more detail:os...

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

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