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Favourite performance tuning tricks [closed]
...have a query or stored procedure that needs performance tuning, what are some of the first things you try?
29 Answers
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Swapping column values in MySQL
I have a MySQL table with coordinates, the column names are X and Y. Now I want to swap the column values in this table, so that X becomes Y and Y becomes X. The most apparent solution would be renaming the columns, but I don't want to make structure changes since I don't necessarily have permission...
Django in / not in query
...les with the list constructor [table2...] -> list(table2...) worked for me.
– RickyA
Nov 23 '11 at 10:30
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Why do we need to install gulp globally and locally?
...t I need to install gulp first globally (with -g flag) and then one more time locally. Why do I need this?
7 Answers
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Set Matplotlib colorbar size to match graph
I cannot get the colorbar on imshow graphs like this one to be the same height as the graph, short of using Photoshop after the fact. How do I get the heights to match?
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iOS 7: UITableView shows under status bar
...y application is a UITableViewController without a navigation bar, which means that the content flows under the status bar so there's a lot of text collisions. I've adjusted both the properties for Under top bars and Adjust scroll view insets which do actually stop it from scrolling under, but...
Best way to test if a generic type is a string? (C#)
...ht I tried that solution earlier and it did not work, but I must've done something stupid. And thanks for pointing out default(string) returns null, we did not run into an error yet because of it, but that is true.
– Rex M
May 29 '10 at 0:32
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H2 in-memory database. Table not found
... . I create a table using CREATE TABLE PERSON (ID INT PRIMARY KEY, FIRSTNAME VARCHAR(64), LASTNAME VARCHAR(64)); . I then select everything from this (empty) table using SELECT * FROM PERSON . So far, so good.
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Undo svn add without reverting local edits
...of files that shouldn't be in the repository. I also have local edits in some files that I want to keep. Is there a simple way to just undo the svn add without reverting the local edits? The main suggestion I see on Google is svn revert , which supposedly undoes the local edits.
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Clang vs GCC - which produces faster binaries? [closed]
...pondering switching. There is one deciding factor though - quality (speed, memory footprint, reliability) of binaries it produces - if gcc -O3 can produce a binary that runs 1% faster, or Clang binaries take up more memory or just fail due to compiler bugs, it's a deal-breaker.
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