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1500 questions
1210
votes
15 answers
How to reload .bash_profile from the command line
How can I reload file .bash_profile from the command line?
I can get the shell to recognize changes to .bash_profile by exiting and logging back in, but I would like to be able to do it on demand.
markdorison
- 139,374
- 27
- 55
- 71
1210
votes
31 answers
No 'Access-Control-Allow-Origin' header is present on the requested resource—when trying to get data from a REST API
I'm trying to fetch some data from the REST API of HP Alm. It works pretty well with a small curl script—I get my data.
Now doing that with JavaScript, fetch and ES6 (more or less) seems to be a bigger issue. I keep getting this error…
daniel.lozynski
- 14,907
- 6
- 18
- 21
1210
votes
16 answers
What do "branch", "tag" and "trunk" mean in Subversion repositories?
I've seen these words a lot around Subversion (and I guess general repository) discussions.
I have been using SVN for my projects for the last few years, but I've never grasped the complete concept of these directories.
What do they mean?
grapefrukt
- 27,016
- 6
- 49
- 73
1209
votes
8 answers
How can I do Base64 encoding in Node.js?
Does Node.js have built-in Base64 encoding yet?
The reason why I ask this is that final() from crypto can only output hexadecimal, binary or ASCII data. For example:
var cipher = crypto.createCipheriv('des-ede3-cbc', encryption_key, iv);
var ciph =…
murvinlai
- 48,919
- 52
- 129
- 177
1209
votes
18 answers
What is the difference between --save and --save-dev?
What is the difference between:
npm install [package_name]
and:
npm install [package_name] --save
and:
npm install [package_name] --save-dev
What does this mean? And what is really the effect of --save and -dev keywords?
nfort
- 12,234
- 3
- 13
- 13
1209
votes
9 answers
What are POD types in C++?
I've come across this term POD-type a few times.
What does it mean?
oz10
- 153,307
- 27
- 93
- 128
1209
votes
15 answers
Defining a variable with or without export
What is export for?
What is the difference between:
export name=value
and
name=value
flybywire
- 261,858
- 191
- 397
- 503
1208
votes
15 answers
How to understand nil vs. empty vs. blank in Ruby
I find myself repeatedly looking for a clear definition of the differences of nil?, blank?, and empty? in Ruby on Rails. Here's the closest I've come:
blank? objects are false, empty, or a whitespace string. For example, "", " ", nil, [], and {}…
Arrel
- 13,558
- 7
- 26
- 24
1208
votes
25 answers
Find out which remote branch a local branch is tracking
See also:
How can I see which Git branches are tracking which remote / upstream branch?
How can I find out which remote branch a local branch is tracking?
Do I need to parse git config output, or is there a command that would do this for me?
readonly
- 343,444
- 107
- 203
- 205
1207
votes
30 answers
Can't create handler inside thread that has not called Looper.prepare()
What does the following exception mean; how can I fix it?
This is the code:
Toast toast = Toast.makeText(mContext, "Something", Toast.LENGTH_SHORT);
This is the exception:
java.lang.RuntimeException: Can't create handler inside thread that has not…
michael
- 106,540
- 116
- 246
- 346
1206
votes
15 answers
How do I trim whitespace?
Is there a Python function that will trim whitespace (spaces and tabs) from a string?
So that given input " \t example string\t " becomes "example string".
Chris
- 21,549
- 25
- 71
- 99
1205
votes
33 answers
How can you encode a string to Base64 in JavaScript?
I have a PHP script that can encode a PNG image to a Base64 string.
I'd like to do the same thing using JavaScript. I know how to open files, but I'm not sure how to do the encoding. I'm not used to working with binary data.
username
- 18,800
- 11
- 41
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1204
votes
23 answers
What is the best way to conditionally apply a class?
Lets say you have an array that is rendered in a ul with an li for each element and a property on the controller called selectedIndex. What would be the best way to add a class to the li with the index selectedIndex in AngularJS?
I am currently…
respectTheCode
- 42,348
- 18
- 73
- 86
1204
votes
37 answers
Format number to always show 2 decimal places
I would like to format my numbers to always display 2 decimal places, rounding where applicable.
Examples:
number display
------ -------
1 1.00
1.341 1.34
1.345 1.35
I have been using this:…
Varada
- 16,026
- 13
- 48
- 69
1204
votes
19 answers
What is the difference between statically typed and dynamically typed languages?
What does it mean when we say a language is dynamically typed versus statically typed?
Rachel
- 100,387
- 116
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