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How to replace ${} placeholders in a text file?
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Sed!
Given template.txt:
The number is ${i}
The word is ${word}
we just have to say:
sed -e "s/\${i}/1/" -e "s/\${word}/dog/" template.txt
Thanks to Jonathan Leffler for the tip to pass multiple -e arguments to the same sed invocation.
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vim deleting backward tricks
...current backward to beginning of line
dw deletes current to end of current word (including trailing space)
db deletes current to beginning of current word
Read this to learn all the things you can combine with the 'd' command.
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Why should I capitalize my SQL keywords? [duplicate]
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I think the latter is more readable. You can easily separate the keywords from table and column names, etc.
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How to frame two for loops in list comprehension python
..., we will take a simple example from NLP. You want to create a list of all words from a list of sentences where each sentence is a list of words.
>>> list_of_sentences = [['The','cat','chases', 'the', 'mouse','.'],['The','dog','barks','.']]
>>> all_words = [word for sentence in li...
Why use double indirection? or Why use pointers to pointers?
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If you want to have a list of characters (a word), you can use char *word
If you want a list of words (a sentence), you can use char **sentence
If you want a list of sentences (a monologue), you can use char ***monologue
If you want a list of monologues (a biography...
Changing variable names in Vim
... /gc
The * is the same as gn - it searches for the next occurence of the word under cursor AND it becomes the last searched pattern, so when you omit the search pattern in the substitute command, VIM assumes this is the pattern to search for.
For small amounts of var copies, an even quicker one:
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How can I find the first occurrence of a sub-string in a python string?
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what if I want to find the word is from the sentence this is a cool dude ? I tried the find method but it returns index 2 instead of 5. How do i achieve this using find() ?
– Regressor
Apr 12 at 23:09
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Remove trailing newline from the elements of a string list
I have to take a large list of words in the form:
7 Answers
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What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
...ouble quotes around a variable, you tell the shell to treat it as a single word, even if it contains whitespaces:
var="foo bar"
for i in "$var"; do # Expands to 'for i in "foo bar"; do...'
echo $i # so only runs the loop once
done
# foo bar
Contrast that behavior with the following:...
Unicode equivalents for \w and \b in Java regular expressions?
...g punctuation" (usually: underscore). That way, a regex like \w+ matches words like hello , élève , GOÄ_432 or gefräßig .
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