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Giving a border to an HTML table row,
...an set border properties on a tr element, but according to the CSS 2.1 specification, such properties have no effect in the separated borders model, which tends to be the default in browsers. Ref.: 17.6.1 The separated borders model. (The initial value of border-collapse is separate according to CSS...
Bash: Syntax error: redirection unexpected
...s hash bang line? The default system shell in Ubuntu is dash, not bash, so if you have #!/bin/sh then your script will be using a different shell than you expect. Dash does not have the <<< redirection operator.
sha...
get the latest fragment in backstack
How can I get the latest fragment instance added in backstack (if I do not know the fragment tag & id)?
17 Answers
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PostgreSQL ERROR: canceling statement due to conflict with recovery
...ueries on slaves with a duration less than 900 seconds won't be cancelled. If your workload requires longer queries, just set these options to a higher value.
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Retrieve filename from file descriptor in C
...ll give you the name of the file as it was when it was opened — however, if the file was moved or deleted since then, it may no longer be accurate (although Linux can track renames in some cases). To verify, stat the filename given and fstat the fd you have, and make sure st_dev and st_ino are the...
How does Rails keep track of which migrations have run for a database?
...ile name and inserts a row for that "version", indicating it has been run. If you roll back that migration, Rails will delete the corresponding row from schema_migrations.
For example, running a migration file named 20120620193144_create_users.rb will insert a new row with a version of 201206201931...
Maximum length of the textual representation of an IPv6 address?
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8 * 4 + 7 = 39
8 groups of 4 digits with 7 : between them.
But if you have an IPv4-mapped IPv6 address, the last two groups can be written in base 10 separated by ., eg. [::ffff:192.168.100.228]. Written out fully:
0000:0000:0000:0000:0000:ffff:192.168.100.228
(6 * 4 + 5) + 1 + (4 ...
How can I create a UILabel with strikethrough text?
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SWIFT 4 UPDATE CODE
let attributeString: NSMutableAttributedString = NSMutableAttributedString(string: "Your Text")
attributeString.addAttribute(NSAttributedString.Key.strikethroughStyle, value: 2, range: NSMakeRange(0, a...
difference between each.with_index and each_with_index in Ruby?
I'm really confused about the difference between each.with_index and each_with_index . They have different types but seem to be identical in practice.
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Maven command to list lifecycle phases along with bound goals?
... but I can't find an easy way to list the goals associated for each maven lifecycle phase for a given project.
5 Answers
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