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How to check if character is a letter in Javascript?
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The code only tests whether the character is one of the basic letter from a to z (very few languages are written using only those letters). This is very different from the Java function that was mentioned.
– Jukka K. ...
Check if a method exists
Is there any way I can test if a method exists in Objective-C?
5 Answers
5
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Meaning of “[: too many arguments” error from if [] (square brackets)
...aracters, and single square brackets are used (which is a shortcut for the test command), then the string may be split out into multiple words. Each of these is treated as a separate argument.
So that one variable is split out into many arguments:
VARIABLE=$(/some/command);
# returns "hello wor...
How can I list all collections in the MongoDB shell?
...ase to show all collection/tables inside it.
>show dbs
users 0.56787GB
test (empty)
>db.test.help() // this will give you all the function which can be used with this db
>use users
>show tables //will show all the collection in the db
...
How to check if a file exists in a folder?
... log.Info(fi.Exists);
or File.Exists Method:
string curFile = @"c:\temp\test.txt";
Console.WriteLine(File.Exists(curFile) ? "File exists." : "File does not exist.");
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...
Reading a huge .csv file
...ive series of rows
return
I also simplified your filter test; the logic is the same but more concise.
Because you are only matching a single sequence of rows matching the criterion, you could also use:
import csv
from itertools import dropwhile, takewhile
def getstuff(filename,...
Why does instanceof return false for some literals?
... // true
As you can see both typeof and instanceof are insufficient to test whether a value is a boolean, a number or a string - typeof only works for primitive booleans, numbers and strings; and instanceof doesn't work for primitive booleans, numbers and strings.
Fortunately there's a simple s...
Is there a way to list pip dependencies/requirements?
... perusing multiple comments so I am providing an updated answer.
This was tested with pip versions 8.1.2, 9.0.1, 10.0.1, and 18.1.
To get the output without cluttering your current directory on Linux use
pip download [package] -d /tmp --no-binary :all: -v
-d tells pip the directory that downloa...
Can I apply a CSS style to an element name?
...too.
It will affect all elements with this name.
For example:
[name=test] {
width: 100px;
}
<input type=text name=test>
<div name=test></div>
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What's the difference between the various methods to get a Context?
...hoose among your choices.
So here is my conclusion: I suppose (I have not tested it further) than the baseContext is required when dealing with contextMenu in your Activity...
The test has been done coding with API 8, and tested on an HTC Desire, android 2.3.3.
I hope my comment have not bored yo...