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How to read lines of a file in Ruby
I was trying to use the following code to read lines from a file. But when reading a file , the contents are all in one line:
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Best way to store a key=>value array in JavaScript?
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That's just what a JavaScript object is:
var myArray = {id1: 100, id2: 200, "tag with spaces": 300};
myArray.id3 = 400;
myArray["id4"] = 500;
You can loop through it using for..in loop:
for (var key in myArray) {
console.log("key " + key + " has value " + myArray[key]);
}
See ...
How to create a subdirectory for a project QtCreator?
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One method you could use is to add a project include file for each sub directory.
Qt Creator displays these in the GUI in a nested fashion, and allows you to add files to them.
e.g.
in project.pro
include(folder1/include.pri)
in folder1/include.pri
HEADERS += MyClass.h
S...
How to delete from a text file, all lines that contain a specific string?
How would I use sed to delete all lines in a text file that contain a specific string?
17 Answers
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Insert, on duplicate update in PostgreSQL?
...ause. with the following syntax (similar to MySQL)
INSERT INTO the_table (id, column_1, column_2)
VALUES (1, 'A', 'X'), (2, 'B', 'Y'), (3, 'C', 'Z')
ON CONFLICT (id) DO UPDATE
SET column_1 = excluded.column_1,
column_2 = excluded.column_2;
Searching postgresql's email group archives ...
How to parse JSON in Scala using standard Scala classes?
...ult = JSON.parseFull(jsonStr)
result match {
// Matches if jsonStr is valid JSON and represents a Map of Strings to Any
case Some(map: Map[String, Any]) => println(map)
case None => println("Parsing failed")
case other => println("Unknown data structure: " + other)
}
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How can I get a file's size in C++? [duplicate]
...mplementary question to this one .
What is the most common way to get the file size in C++?
Before answering, make sure it is portable (may be executed on Unix, Mac and Windows),
reliable, easy to understand and without library dependencies (no boost or qt, but for instance glib is ok since it is p...
git add only modified changes and ignore untracked files
I ran "git status" and listed below are some files that were modified/or under the heading "changes not staged for commit".
It also listed some untracked files that I want to ignore (I have a ".gitignore" file in these directories).
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How do I find files with a path length greater than 260 characters in Windows?
...ep getting an 'Insufficient Memory' error, which I understand is because a file I'm trying to copy has too long a path. I can easily reduce the path length, but unfortunately I can't work out which files are violating the path length restriction. The files that are copied are printed to the standa...
Git Gui: Perpetually getting “This repository currently has approximately 320 loose objects.”
...r of housekeeping tasks within the current repository, such as compressing file revisions (to reduce disk space and increase performance) and removing unreachable objects which may have been created from prior invocations of git add.
Users are encouraged to run this task on a regular basis within ea...