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What does the function then() mean in JavaScript?
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The traditional way to deal with asynchronous calls in JavaScript has been with callbacks.
Say we had to make three calls to the server, one after the other, to set up our
application. With callbacks, the code might look something like the following (assuming
a xhrGET fun...
vim command to restructure/force text to 80 columns
I know there are ways to automatically set the width of text in vim using set textwidth (like Vim 80 column layout concerns ). What I am looking for is something similar to = (the indent line command) but to wrap to 80. The use case is sometimes you edit text with textwidth and after joining li...
How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?
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Assuming you've used home-brew to install and upgrade Postgres, you can perform the following steps.
Stop current Postgres server:
launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
Initialize a new 10.1 database:
initdb /usr/local/var/pos...
How are software license keys generated?
... honest, this strikes me as (in)Security Through Obscurity , although I really have no idea how license keys are generated. What is a good (secure) example of license key generation? What cryptographic primitive (if any) are they using? Is it a message digest? If so, what data would they be hashing...
Where should I put tags in HTML markup?
...ace to put the <script> tags and included JavaScript? I seem to recall that you are not supposed to place these in the <head> section, but placing at the beginning of the <body> section is bad, too, since the JavaScript will have to be parsed before the page is rendered compl...
How to get certain commit from GitHub project
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git checkout -q <commit#> silences warning stderr during git checkout.
– Manavalan Gajapathy
Apr 19 '19 at 22:11
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What is the difference between localStorage, sessionStorage, session and cookies?
...stion, and a lot of the pros/cons will be contextual to the situation.
In all cases, these storage mechanisms will be specific to an individual browser on an individual computer/device. Any requirement to store data on an ongoing basis across sessions will need to involve your application server si...
Move entire line up and down in Vim
...at represents the ALT key.
To input that character, use C+v, Esc in Vim (C+q, Esc on Windows).
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No “pull” in Git Gui?
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Well, I found this useful forum post:
http://git.661346.n2.nabble.com/No-quot-pull-quot-in-git-gui-td1121058.html
A fetch and merge should be done.
It seems you need to go to "Remote" menu, then "Fetch from" option , in my case origin, and then go to "Merge Menu" and then "Local Merge...".
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How do I give text or an image a transparent background using CSS?
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The first hex number defines the alpha value of the color.
Full solution all browsers:
.alpha60 {
/* Fallback for web browsers that doesn't support RGBa */
background: rgb(0, 0, 0) transparent;
/* RGBa with 0.6 opacity */
background: rgba(0, 0, 0, 0.6);
/* For IE 5.5 - 7*/
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