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HTML5 Email Validation
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@MichaelDeMutis: You can use the required attribute
– Midhun MP
Mar 22 '14 at 8:08
29
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How do you merge two Git repositories?
...ngly simple.
(1) In A,
PREFIX=projectA #adjust this
git filter-branch --index-filter '
git ls-files -s |
sed "s,\t,&'"$PREFIX"'/," |
GIT_INDEX_FILE=$GIT_INDEX_FILE.new git update-index --index-info &&
mv $GIT_INDEX_FILE.new $GIT_INDEX_FILE
' HEAD
Note: This rewrites ...
Fast way of finding lines in one file that are not in another?
... # preserve whitespace
(NR==FNR) { ll1[FNR]=$0; nl1=FNR; } # file1, index by lineno
(NR!=FNR) { ss2[$0]++; } # file2, index by string
END {
for (ll=1; ll<=nl1; ll++) if (!(ll1[ll] in ss2)) print ll1[ll]
}
This stores the entire contents of file1 line by line in a line-...
Why doesn't this code simply print letters A to Z?
...id result within your range, the $i++ increments it to the next value in sequence), the next value will be 'aa'; and alphabetically, 'aa' is < 'z', so the comparison is never met
for ($i = 'a'; $i != 'aa'; $i++)
echo "$i\n";
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Laravel migration: unique key is too long, even if specified
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You have to set the length of the indexed column according to the limit of 767 bytes. Be aware that VARCHAR may have 1, 2 or 4 bytes for each length unit. Example: utf8_mb4 (4 bytes) -> 767 / 4 = 191. Otherwise utf8_general_ci for VARCHAR(X) with X < 85...
How can I shift-select multiple checkboxes like GMail?
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}
if (e.shiftKey) {
var start = $chkboxes.index(this);
var end = $chkboxes.index(lastChecked);
$chkboxes.slice(Math.min(start,end), Math.max(start,end)+ 1).prop('checked', lastChecked.checked);
}
lastChecked = this;
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How to verify an XPath expression in Chrome Developers tool or Firefox's Firebug?
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Firefox (since version 75)
Since FF 75 it's possible to use raw xpath query without evaluation xpath expressions, see documentation for more info.
Firefox (prior version 75)
Either select "Web Console" from the Web Developer submenu in the
Firefox Menu (or Tools menu if you display the menu...
MySQL复制的概述、安装、故障、技巧、工具 - 数据库(内核) - 清泛网 - 专注...
.../my.cnf）：
[mysqld]
server_id = 100
log_bin = mysql-bin
log_bin_index = mysql-bin.index
sync_binlog = 1
innodb_flush_log_at_trx_commit = 1
innodb_support_xa = 1
注：一定要保证主从服务器各自的server_id唯一，避免冲突。
注：如果没有指定log_bin的话，缺...
How to determine whether a substring is in a different string
... @GamesBrainiac Actually, to do the same in JS it's just string.indexOf(substring) != -1, more here
– LasagnaAndroid
Feb 20 '14 at 20:42
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Rails and PostgreSQL: Role postgres does not exist
I have installed PostgreSQL on my Mac OS Lion, and am working on a rails app. I use RVM to keep everything separate from my other Rails apps.
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