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1500 questions
3467
votes
21 answers
How do I list all files of a directory?
How can I list all files of a directory in Python and add them to a list?
duhhunjonn
- 44,855
- 11
- 28
- 15
3459
votes
104 answers
How can I convert a string to boolean in JavaScript?
Can I convert a string representing a boolean value (e.g., 'true', 'false') into a intrinsic type in JavaScript?
I have a hidden form in HTML that is updated based upon a user's selection within a list. This form contains some fields which represent…
Kevin
- 7,856
- 11
- 35
- 40
3456
votes
30 answers
How to check if a string contains a substring in Bash
I have a string in Bash:
string="My string"
How can I test if it contains another string?
if [ $string ?? 'foo' ]; then
echo "It's there!"
fi
Where ?? is my unknown operator. Do I use echo and grep?
if echo "$string" | grep 'foo'; then
echo…
davidsheldon
- 38,365
- 4
- 27
- 28
3456
votes
24 answers
What is the difference between call and apply?
What is the difference between using Function.prototype.apply() and Function.prototype.call() to invoke a function?
const func = function() {
alert("Hello world!");
};
func.apply() vs. func.call()
Are there performance differences between the…
John Duff
- 38,090
- 5
- 35
- 45
3434
votes
69 answers
How do I format a date in JavaScript?
How do I format a Javascript Date object as a string? (Preferably in the format: 10-Aug-2010)
leora
- 188,729
- 360
- 878
- 1,366
3415
votes
12 answers
Difference between "git add -A" and "git add ."
What is the difference between git add [--all | -A] and git add .?
cmcginty
- 113,384
- 42
- 163
- 163
3414
votes
34 answers
How do I sort a dictionary by value?
I have a dictionary of values read from two fields in a database: a string field and a numeric field. The string field is unique, so that is the key of the dictionary.
I can sort on the keys, but how can I sort based on the values?
Note: I have read…
Gern Blanston
- 42,482
- 19
- 50
- 64
3414
votes
38 answers
Git is not working after macOS update ("xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools")
I updated to the latest OS, and/or restarted my computer (this happens on every major update, but this time all I did was restart my computer on 2022-09-13).
This morning I navigated to my work's codebase in the command line on my MacBook Pro, typed…
dustbuster
- 79,958
- 7
- 21
- 41
3410
votes
30 answers
AngularJS: Service vs provider vs factory
What are the differences between a Service, Provider and Factory in AngularJS?
Lior
- 40,466
- 12
- 38
- 40
3405
votes
22 answers
Echo newline in Bash prints literal \n
How do I print a newline? This merely prints \n:
$ echo -e "Hello,\nWorld!"
Hello,\nWorld!
Sergey
- 47,222
- 25
- 87
- 129
3397
votes
43 answers
Creating multiline strings in JavaScript
I have the following code in Ruby. I want to convert this code into JavaScript. What is the equivalent code in JS?
text = <<"HERE"
This
Is
A
Multiline
String
HERE
Newy
- 38,977
- 9
- 43
- 59
3395
votes
25 answers
What is a serialVersionUID and why should I use it?
Eclipse issues warnings when a serialVersionUID is missing.
The serializable class Foo does not declare a static final
serialVersionUID field of type long
What is serialVersionUID and why is it important? Please show an example where missing…
ashokgelal
- 80,002
- 26
- 71
- 84
3394
votes
17 answers
How do I select rows from a DataFrame based on column values?
How can I select rows from a DataFrame based on values in some column in Pandas?
In SQL, I would use:
SELECT *
FROM table
WHERE column_name = some_value
szli
- 36,893
- 11
- 32
- 40
3384
votes
31 answers
Case insensitive 'Contains(string)'
Is there a way to make the following return true?
string title = "ASTRINGTOTEST";
title.Contains("string");
There doesn't seem to be an overload that allows me to set the case sensitivity. Currently I UPPERCASE them both, but that's just silly (by…
Boris Callens
- 90,659
- 85
- 207
- 305
3371
votes
34 answers
How can I change an element's class with JavaScript?
How can I change the class of an HTML element in response to an onclick or any other events using JavaScript?
Nathan Smith
- 36,807
- 6
- 28
- 25