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Regex exactly n OR m times
...?? is lazy, ? is greedy)
*, *? - any number of occurences
+, +? - at least one occurence
{n} - exactly n occurences
{n,m} - n to m occurences, inclusive
{n,m}? - n to m occurences, lazy
{n,}, {n,}? - at least n occurence
To get "exactly N or M", you need to write the quantified regex twice, unless...
Importing Maven project into Eclipse
...nt to import existing maven project into eclipse. I found 2 ways to do it, one is through running from command line mvn eclipse:eclipse and another is to install maven eclipse plugin from eclipse. What is the difference between the both and which one is preferable?
The maven-eclipse-plugin is a Ma...
Remove Primary Key in MySQL
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One Line:
ALTER TABLE `user_customer_permission` DROP PRIMARY KEY , ADD PRIMARY KEY ( `id` )
You will also not lose the auto-increment and have to re-add it which could have side-effects.
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How can I use a batch file to write to a text file?
I need to make a script that can write one line of text to a text file in the same directory as the batch file.
7 Answers
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How do you display code snippets in MS Word preserving format and syntax highlighting?
Does anyone know a way to display code in Microsoft Word documents that preserves coloring and formatting? Preferably, the method would also be unobtrusive and easy to update.
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Multiple line code example in Javadoc comment
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In addition to the already mentioned <pre> tags, you should also use the @code JavaDoc annotation, which will make life much easier when it comes to HTML entities issues (in particular with Generics), e.g.:
* <pre>
* {@code
* Set<String> ...
.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,
...ately, some of them are quite similar, and I'm not always sure when to use one and when to use another. Most of my C# and Visual Basic books talk about them to a certain extent, but they never really go into any real detail.
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How do I update a Python package?
...e names.
Then, the $(...) will make it a variable and then, everything is done auto matically. Make sure you have the permissions. (Just put sudo before pip if you're confused)
I would write a script named, pip-upgrade
The code is bellow,
#!/bin/bash
sudo pip install $(pip list --outdated | awk '{ ...
How to fetch the row count for all tables in a SQL SERVER database [duplicate]
...is worked great. I sat back and said "this might take a while" and it was done in two seconds. Was dealing with a 528 table database and had no idea how large it actually was
– trench
Jul 25 '18 at 12:52
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How do I check if a C++ std::string starts with a certain string, and convert a substring to an int?
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this answer should be the most up voted not the boost one :D why use another library when you already have STL.
– Iuliu Atudosiei
Feb 15 '17 at 3:34
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