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What does a b prefix before a python string mean?
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This is Python3 bytes literal. This prefix is absent in Python 2.5 and older (it is equivalent to a plain string of 2.x, while plain string of 3.x is equivalent to a literal with u prefix in 2.x). In Python 2.6+ it is equivalent to a plain string, for compatibility with 3.x.
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How to add multiple columns to a table in Postgres?
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and to set the default value: ALTER TABLE table ADD COLUMN col1 int default 0, ADD COLUMN col2 text default 'foo';
– Brian D
Feb 11 at 15:36
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Can I prevent the Firefox developer tools network panel from clearing on page reload?
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And it's on central column on the top of the screen (for those who haven't an english version of the settings, in fr : "Préférence générales/activer les journaux persistants")
– pdem
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string.ToLower() and string.ToLowerInvariant()
What's the difference and when to use what? What's the risk if I always use ToLower() and what's the risk if I always use ToLowerInvariant() ?
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Replace one character with another in Bash
...lexity is worse than linear. A small test: x="$(tr -dc 'a-z \n' </dev/urandom | head -c1M)"; time y="$(tr ' ' \\- <<< "$x")"; time z="${x// /-}". With a string length of 1M (=2^20) tr took 0.04s and bash 5.0.11 took 17s. With 2M tr took 0.07s (expected) but bash took 69s (4 times as lon...
jQuery - checkbox enable/disable
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You can do this using attribute selectors without introducing the ID and classes but it's slower and (imho) harder to read.
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Routes with Dash `-` Instead of Underscore `_` in Ruby on Rails
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With Rails 3 and later you can do like this:
resources :user_bundles, :path => '/user-bundles'
Another option is to modify Rails, via an initializer.
I don't recommend this though, since it may break in future versions (edit: does...
How do I delete a Git branch with TortoiseGit
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In the Browse refs dialog we can right click on the local branch and choose to delete it.
To delete a remote branch we can do the same thing, but instead of right clicking on our local branch we expand the remotes tree in the left part of the dialog and then locate the remote branch.
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Git: how to reverse-merge a commit?
...o actually remove a commit from an arbitrary point in the past by rebasing and then resetting, but you really don't want to do that if you have already pushed your commits to another repository (or someone else has pulled from you).
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String to LocalDate
... Also submitted an edit for the format "yyyy-MMM-dd". YYYY is year of era, and (more egregiously) DD is day of year.
– Spencer Kormos
Jan 5 '12 at 16:55
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