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Why do this() and super() have to be the first statement in a constructor?
Java requires that if you call this() or super() in a constructor, it must be the first statement. Why?
19 Answers
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Preserve line endings
... run sed to do some substitution on windows and I noticed that it automatically converts line endings to Unix (\n). Is there an option to tell sed to use Windows line endings (\r\n) or even better to preserve the line endings from the file?
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static function in C
... /* ok, f2 is in the same translation unit */
/* (basically same .c file) as f1 */
}
int f2(int foo) {
return 42 + foo;
}
main.c:
int f1(int); /* prototype */
int f2(int); /* prototype */
int main(void) {
f1(10); /* ok, f1 is visible to the linker */
f2(1...
Is there any way to use a numeric type as an object key?
...in an object, it always gets converted to a string. Is there anyway to actually get it to store as a numeric? The normal typecasting does not seem to work.
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Execute command on all files in a directory
...rovide the code to do the following:
Assume there is a directory of files, all of which need to be run through a program. The program outputs the results to standard out. I need a script that will go into a directory, execute the command on each file, and concat the output into one big output file.
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How to tell bash that the line continues on the next line
...ng, and the backslash can be omitted. Some examples:
# In general
$ echo "foo" \
> "bar"
foo bar
# Pipes
$ echo foo |
> cat
foo
# && and ||
$ echo foo &&
> echo bar
foo
bar
$ false ||
> echo bar
bar
Different, but related, is the implicit continuation inside quotes. ...
Python base64 data decode
...\x00\x00D\xc8\x001\x00\x00\x00\x00'
What problem are you having, specifically?
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What is the “->” PHP operator called and how do you say it when reading code out loud? [closed]
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I call it "dart"; as in $Foo->bar() : "Foo dart bar"
Since many languages use "dot" as in Foo.bar(); I wanted a one-syllable word to use. "Arrow" is just too long-winded! ;)
Since PHP uses . "dot" for concatenation (why?) I can't safely say "dot...
How do I remove an array item in TypeScript?
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If array is type of objects, then the simplest way is
let foo_object // Item to remove
this.foo_objects = this.foo_objects.filter(obj => obj !== foo_object);
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Java equivalent to Explode and Implode(PHP) [closed]
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Thanks u guys for all your answers .
– Pankaj Wanjari
May 28 '13 at 5:55
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