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Appending the same string to a list of strings in Python
...ng of "s". like so list2 = ["mystring" + s for s in mylist] = list2 = ['barfoo', 'barfob', 'barfaz', 'barfunk']
– Paul Tuckett
May 14 '19 at 20:53
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Is there a standard function to check for null, undefined, or blank variables in JavaScript?
...t undefined or null ? I've got this code, but I'm not sure if it covers all cases:
41 Answers
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Check if a key exists inside a json object
...ld, it will shadow the original func. Use Object.prototype.hasOwnProperty.call(thisSession, 'merchant_id')
– Zmey
Dec 25 '19 at 17:38
add a comment
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How to get the position of a character in Python?
...ring.index('s')
2
>>> myString.index('x')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: substring not found
From the Python manual
string.find(s, sub[, start[, end]])
Return the lowest index in s where the substring sub is found s...
C# switch statement limitations - why?
...a big if-else statement.
Each case must be unique and evaluated
statically. The switch statement does
a constant time branch regardless of
how many cases you have. The if-else
statement evaluates each condition
until it finds one that is true.
In fact, the C# switch statement is n...
How to stop event propagation with inline onclick attribute?
...
The event object is a parameter of the callback. Actually, there is no such thing as the event object in IE because this object is accessible through window.event instead of being a parameter of the function :-)
– Vincent Robert
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How to run a class from Jar which is not the Main-Class in its Manifest file
...
And if you want all jars in current directory on classpath too (eg. running Main class from lib directory) you can use java -cp "./*" com.mycomp.myproj.AnotherClassWithMainMethod Note the double quotes around ./* preventing unix machines fro...
How to Implement DOM Data Binding in JavaScript
...ake this work, your object needs to implement the eventListener interface. All that's needed to accomplish this is to give the object a handleEvent() method.
That's where the inheritance comes in.
MyCtor.prototype.handleEvent = function(event) {
switch (event.type) {
case "change": th...
What does the number in parentheses shown after Unix command names in manpages mean?
...he command is assigned to.
These are split as
General commands
System calls
C library functions
Special files (usually devices, those found in /dev) and drivers
File formats and conventions
Games and screensavers
Miscellanea
System administration commands and daemons
Original descriptions of e...
Determine if a function exists in bash
..., built-in function, external command, or just not defined. Example:
$ LC_ALL=C type foo
bash: type: foo: not found
$ LC_ALL=C type ls
ls is aliased to `ls --color=auto'
$ which type
$ LC_ALL=C type type
type is a shell builtin
$ LC_ALL=C type -t rvm
function
$ if [ -n "$(LC_ALL=C type -t rvm)...