大约有 48,000 项符合查询结果（耗时：0.0513秒） [XML]
'is' versus try cast with null check
... below the belt. Take a look at this example:
object o = "test";
if (o is string)
{
var x = (string) o;
}
This translates to the following IL:
IL_0000: nop
IL_0001: ldstr "test"
IL_0006: stloc.0 // o
IL_0007: ldloc.0 // o
IL_0008: isinst System.String
IL_000D...
MySQL Query GROUP BY day / month / year
...ion when grouping will be faster than DATE_FORMAT function (which return a string value). Try using function|field that return non-string value for SQL comparison condition (WHERE, HAVING, ORDER BY, GROUP BY).
share
...
HTML5 Email Validation
... type=email page of the www.w3.org site notes that an email address is any string which matches the following regular expression:
/^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/
Use the required attribute and a pattern attribute to require the value to match the regex...
Python list directory, subdirectory, and files
...e hard-coded path ./ in the os.walk(...) call, you can supplement any path string you like.
Note: os.path.expanduser and/or os.path.expandvars can be used for paths strings like ~/
Extending this example:
Its easy to add in file basename tests and directoryname tests.
For Example, testing for *...
No submodule mapping found in .gitmodule for a path that's not a submodule
...
in the file .gitmodules, I replaced string
"path = thirdsrc\boost"
with
"path = thirdsrc/boost",
and it solved! - -
share
|
improve this answer
...
Checking if form has been submitted - PHP
...e steps:
Generate a unique token (you can use hash) Ex:
$token = hash (string $algo , string $data [, bool $raw_output = FALSE ] );
Assign this token to a session variable. Ex:
$_SESSION['form_token'] = $token;
Add a hidden input to submit the token. Ex:
input type="hidden" name="token" va...
Unit Testing AngularJS directive with templateUrl
... we are going to have a big piece of html that we are going to inject as a string into the template cache then what are we gonna do when we change the html on the front end? Change the html in the test as well? IMO that is an unsustainable answer and the reason we went with using the template over t...
Escape a string for a sed replace pattern
In my bash script I have an external (received from user) string, which I should use in sed pattern.
14 Answers
...
An example of how to use getopts in bash
...
#!/bin/bash
usage() { echo "Usage: $0 [-s <45|90>] [-p <string>]" 1>&2; exit 1; }
while getopts ":s:p:" o; do
case "${o}" in
s)
s=${OPTARG}
((s == 45 || s == 90)) || usage
;;
p)
p=${OPTARG}
...
Selecting and manipulating CSS pseudo-elements such as ::before and ::after using jQuery
...) with $('p')[0] when using jQuery, for slightly shorter code.
Pros: any string can be dynamically inserted into the style
Cons: original styles aren't altered, just overridden; repeated (ab)use can make the DOM grow arbitrarily large
3) Alter a different DOM attribute
You can also to use att...