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What is the difference between syntax and semantics in programming languages?
What is the difference between syntax and semantics in programming languages (like C, C++)?
10 Answers
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Expression Versus Statement
...hat still survives is C. The designers of C realized that no harm was done if you were allowed to evaluate an expression and throw away the result. In C, every syntactic expression can be a made into a statement just by tacking a semicolon along the end:
1 + 2 / x;
is a totally legit statement ev...
How can I efficiently download a large file using Go?
...ader, to, e.g. read a chunk at a time rather than all at once. In this specific case, io.Copy() does the gruntwork for you.
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“var” or no “var” in JavaScript's “for-in” loop?
...he variable looks up to the nearest closure searching for a var statement. If it cannot find a var then it is global (if you are in a strict mode, using strict, global variables throw an error). This can lead to problems like the following.
function f (){
for (i=0; i<5; i++);
}
var i = 2;
f ...
Git pull results in extraneous “Merge branch” messages in commit log
...he target branch (in your case, the remote). As the recreated commits are different commits, this can cause a lot of confusion when developing together with others, especially when people already checked out parts of those commits before they get rewritten (for example with feature branches). So as ...
How to exit a function in bash
How would you exit out of a function if a condition is true without killing the whole script, just return back to before you called the function.
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Creating a new directory in C
I want to write a program that checks for the existence of a directory; if that directory does not exist then it creates the directory and a log file inside of it, but if the directory already exists, then it just creates a new log file in that folder.
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Are Duplicate HTTP Response Headers acceptable?
I have not found any specification about whether duplicate HTTP response headers are allowed by the standard, but I need to know if this will cause compatibility issues.
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How do you compare two version Strings in Java?
... return this.version;
}
public Version(String version) {
if(version == null)
throw new IllegalArgumentException("Version can not be null");
if(!version.matches("[0-9]+(\\.[0-9]+)*"))
throw new IllegalArgumentException("Invalid version format");
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What permission do I need to access Internet from an Android application?
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Add the INTERNET permission to your manifest file.
You have to add this line:
<uses-permission android:name="android.permission.INTERNET" />
outside the application tag in your AndroidManifest.xml
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