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When is .then(success, fail) considered an antipattern for promises?
...ntions that .then(success, fail) is an antipattern . I don't quite understand its explanation as for the try and catch.
What's wrong with this the following?
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What does the line “#!/bin/sh” mean in a UNIX shell script?
I was going through some shell script tutorials and found the following sample program:
5 Answers
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Rails: What's a good way to validate links (URLs)?
...ffix List, a list maintained by Mozilla. I created a Ruby library to parse and validate domains against the Public Suffix List, and it's called PublicSuffix.
If you want to validate the format of an URI/URL, then you might want to use regular expressions. Instead of searching for one, use the built-...
Salting Your Password: Best Practices?
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Prefix or suffix is irrelevant, it's only about adding some entropy and length to the password.
You should consider those three things:
The salt has to be different for every password you store. (This is quite a common misunderstanding.)
Use a cryptographically secure random number generat...
How to split a string in Java
... *, the plus sign +, the opening parenthesis (, the closing parenthesis ), and the opening square bracket [, the opening curly brace {, These special characters are often called "metacharacters".
So, if you want to split on e.g. period/dot . which means "any character" in regex, use either backsla...
Get Substring - everything before certain char
... Some example strings are below. The length of the string before - varies and can be any length
8 Answers
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How to update SQLAlchemy row entry?
Assume table has three columns: username , password and no_of_logins .
5 Answers
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Add a prefix to all Flask routes
...n as a sub-part of that WSGI container (anything that speaks WSGI will do) and to set your APPLICATION_ROOT config value to your prefix:
app.config["APPLICATION_ROOT"] = "/abc/123"
@app.route("/")
def index():
return "The URL for this page is {}".format(url_for("index"))
# Will return "The UR...
Preventing scroll bars from being hidden for MacOS trackpad users in WebKit/Blink
...-scrollbar pseudo-elements [blog]. You can disable the default appearance and behaviour by setting -webkit-appearance [docs] to none.
Because you're removing the default style, you'll also need to specify the style yourself or the scroll bar will never show up. The following CSS recreates the app...
What are Flask Blueprints, exactly?
I have read the official Flask documentation on Blueprints and even one or two blog posts on using them.
4 Answers
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