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Cannot change column used in a foreign key constraint
...CK TABLES; is executed
http://dev.mysql.com/doc/refman/5.5/en/lock-tables.html
EDIT 2: OP asked for a more detailed explanation of the line "The type and definition of foreign key field and reference must be equal. This means your foreign key disallows changing the type of your field."
From MySQL...
Can git automatically switch between spaces and tabs?
...s=2 --initial
Then I have two files:
attributes
*.js filter=tabspace
*.html filter=tabspace
*.css filter=tabspace
*.json filter=tabspace
and attributes2
*.js filter=tabspace2
*.html filter=tabspace2
*.css filter=tabspace2
*.json filter=tabspace2
Working on personal projects
mkdir pr...
Output array to CSV in Ruby
...ent documentation on CSV: http://ruby-doc.org/stdlib/libdoc/csv/rdoc/index.html
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clang: how to list supported target architectures?
...urce code.
in llvm/ADT/Triple.h (http://llvm.org/doxygen/Triple_8h_source.html):
enum ArchType {
UnknownArch,
arm, // ARM: arm, armv.*, xscale
aarch64, // AArch64: aarch64
hexagon, // Hexagon: hexagon
mips, // MIPS: mips, mipsallegrex
mipsel, // MIPSEL: mipsel, m...
Is it smart to replace boost::thread and boost::mutex with c++11 equivalents?
... The shared_mutex docs are at boost.org/doc/libs/1_47_0/doc/html/thread/…. You either lock the mutex as shared or exclusive, and then use the corresponding unlock function. You can also use the RAII types to do this (shared_lock takes a shared read lock, and lock_guard and unique_lo...
PHP: How to remove all non printable characters in a string?
...lot, i tried every encoding function available in PHP from regex to mb_ to htmlspecialchars etc. Nothing removed control characters, thanks for investing the work.
– John
Jan 6 '18 at 3:27
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What's the difference between libev and libevent?
...cts. Evident for example in lists.schmorp.de/pipermail/libev/2017q1/002710.html or lists.schmorp.de/pipermail/libev/2010q1/000912.html. Potential users should probably consider this, too.
– dbrank0
Mar 22 '17 at 8:36
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list every font a user's browser can display
...ocument.createElement("span");
s.style.fontSize = testSize;
s.innerHTML = testString;
var defaultWidth = {};
var defaultHeight = {};
for (var index in baseFonts) {
//get the default width for the three base fonts
s.style.fontFamily = baseFonts[index];
h.ap...
JOIN queries vs multiple queries
...
Source: https://dev.mysql.com/doc/refman/8.0/en/nested-join-optimization.html ; https://dev.mysql.com/doc/workbench/en/wb-relationship-tools.html
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Which “href” value should I use for JavaScript links, “#” or “javascript:void(0)”?
... one method of attachment or another. Hence my onclick (or on anything) in HTML markup look like this:
onclick="someFunc.call(this)"
OR
onclick="someFunc.apply(this, arguments)"
Using javascript:void(0) avoids all of the above headaches, and I haven't found any examples of a downside.
So if y...