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Hidden features of Scala
What are the hidden features of Scala that every Scala developer should be aware of?
28 Answers
...
Count number of occurrences of a pattern in a file (even on same line)
...ple files? Let's say I want to see the number of occurrences per file on a set of files. I can do it per line with grep -c *, but not per instance.
– Keith Tyler
Apr 11 '17 at 23:13
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Argument list too long error for rm, cp, mv commands
...arameters) that exceeds the ARG_MAX limit.
On kernel 2.6.23, the limit was set at 128 kB. This constant has been increased and you can get its value by executing:
getconf ARG_MAX
# 2097152 # on 3.5.0-40-generic
Solution: Using for Loop
Use a for loop as it's recommended on BashFAQ/095 and there ...
MIN and MAX in C
Where are MIN and MAX defined in C, if at all?
14 Answers
14
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What is the combinatory logic equivalent of intuitionistic type theory?
...irst stab at encoding Martin-Löf's delightfully simple (but inconsistent) Set : Set system in a combinatory style. It's not a good way to finish, but it's the easiest place to get started. The syntax of this type theory is just lambda-calculus with type annotations, Pi-types, and a universe Set.
T...
How to perform file system scanning
...
EDIT: Enough people still hit this answer, that I thought I'd update it for the Go1 API. This is a working example of filepath.Walk(). The original is below.
package main
import (
"path/filepath"
"os"
"flag"
"fmt"
)
func visit(path string, f os.FileInfo, err error) error {
fmt.Prin...
What does “fragment” mean in ANTLR?
...e.toStringTree(recog=parser))
listener = MyListener()
walker = ParseTreeWalker()
walker.walk(listener, tree)
# end-of-def
main()
Case1 and results:
Alphabet.g4 (Case1)
grammar Alphabet;
content : (rule0|ANYCHAR)* EOF;
rule0 : RULE1 | RULE2 | RULE3 ;
RULE1 : [A-C]+ ;
RULE2 : [...
Getting rid of \n when using .readlines() [duplicate]
I have a .txt file with values in it.
11 Answers
11
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How to remove leading and trailing whitespace in a MySQL field?
...
You're looking for TRIM.
UPDATE FOO set FIELD2 = TRIM(FIELD2);
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How to create a new file together with missing parent directories?
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