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How do you reverse a string in place in JavaScript?
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string concatenation is expensive. Better to build an array and join it or use concat().
– Bjorn
Jun 6 '09 at 5:52
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How do I append one string to another in Python?
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If you only have one reference to a string and you concatenate another string to the end, CPython now special cases this and tries to extend the string in place.
The end result is that the operation is amortized O(n).
e.g.
s = ""
for i in range(n):
s+=str(i)
used to ...
Creating multiline strings in JavaScript
...{user.name} liked your post about strings`;
This just transpiles down to concatenation:
user.name + ' liked your post about strings'
Original ES5 answer:
Google's JavaScript style guide recommends to use string concatenation instead of escaping newlines:
Do not do this:
var myString =...
Why can I add named properties to an array as if it were an object?
...cts, just slightly modified (with a few more functions).
Functions like:
concat
every
filer
forEach
join
indexOf
lastIndexOf
map
pop
push
reverse
shift
slice
some
sort
splice
toSource
toString
unshift
valueOf
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How to uglify output with Browserify in Gulp?
...serify, and each entry file will result in separate bundle. If you want to concatenate all of the bundle outputs into a single file, you can use gulp-concat and add it to the end of your gulp pipeline. That will be the equivalent of running browserify <options> > single-file.js in terminal....
Is Enabling Double Escaping Dangerous?
...the uri decoded data (such as generating local filesystem URI's via string concatenation).
To disable the check do the following (from here): (see my comment below for what double escaping entails).
<system.webServer>
<security>
<requestFiltering allowDoubleEscaping="tru...
How can I get a JavaScript stack trace when I throw an exception?
...trace() {
function st2(f) {
return !f ? [] :
st2(f.caller).concat([f.toString().split('(')[0].substring(9) + '(' + f.arguments.join(',') + ')']);
}
return st2(arguments.callee.caller);
}
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How can I filter lines on load in Pandas read_csv function?
...about memory running out, then use an iterator and apply the filter as you concatenate chunks of your file e.g.:
import pandas as pd
iter_csv = pd.read_csv('file.csv', iterator=True, chunksize=1000)
df = pd.concat([chunk[chunk['field'] > constant] for chunk in iter_csv])
You can vary the chunk...
How do I check to see if a value is an integer in MySQL?
...his query will give the rows with Int values
SELECT col1 FROM table WHERE concat('',col * 1) = col;
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Any equivalent to .= for adding to beginning of string in PHP?
...n assignment operator and no one commented on its usage for general string concatenation.
You may want to look into the use of the sprintf (documentation) family of functions for string concatenation.
It provides a lot more sanitization and usability than just combining two strings with assignment ...