大约有 30,000 项符合查询结果（耗时：0.0461秒） [XML]
Show an image preview before upload
...bute of an image tag to a data URL:
The html code:
<input type="file" id="files" />
<img id="image" />
The JavaScript code:
document.getElementById("files").onchange = function () {
var reader = new FileReader();
reader.onload = function (e) {
// get loaded data and...
Postgresql GROUP_CONCAT equivalent?
I have a table and I'd like to pull one row per id with field values concatenated.
7 Answers
...
Is it possible to GROUP BY multiple columns using MySQL?
...would change the ascending order of col2 returning. 1,1|2,2|1,3 Demo: sqlfiddle.com/#!9/d5f69/1 Note that row id: 2 is returned in both cases for 2,2 despite inverting the columns.
– Will B.
May 24 '16 at 17:35
...
Google Chromecast sender error if Chromecast extension is not installed or using incognito
... have two options:
1) Target the video to the channel and play it there
2) Call the video via ajax, like explain here (i've decided for this one) in a colorbox or any another plugin.
and like this, i prevent the google cast sender error make my site slow
...
open-ended function arguments with TypeScript
...
Yes. It complains about the call but you can declare sum as accepting multiple parameters of any type by changing the signature to sum(...) instead an it will quiet the error. Please feel free to submit this as a bug on CodePlex.
–...
Secret copy to clipboard JavaScript function in Chrome and Firefox?
...ole functions - at least that seems to be the case for Firebug. If you try calling window.copy for instance, you'll get a warning about function not defined, so it's definitely not a browser function, and cannot be used in normal JavaScript files. The following functions also seems to work in the Ja...
sql primary key and index
Say I have an ID row (int) in a database set as the primary key. If I query off the ID often do I also need to index it? Or does it being a primary key mean it's already indexed?
...
Is there any git hook for pull?
...do something every time you pull... you could alias 'git pull' so that you call a script that does the git pull then does something else
– Shadow Radiance
Jun 20 '14 at 14:21
...
How to draw circle in html page?
...
You can't draw a circle per se. But you can make something identical to a circle.
You'd have to create a rectangle with rounded corners (via border-radius) that are one-half the width/height of the circle you want to make.
#circle {
width: 50px;
height: 50px;
...
How can one see the structure of a table in SQLite? [duplicate]
... todos_server_snapshot
sqlite> .schema alarms
CREATE TABLE alarms (ROWID INTEGER PRIMARY KEY AUTOINCREMENT, alarm_id,
todo INTEGER, flags INTEGER, offset_days INTEGER,
reminder_date INTEGER, time INTEGER, argument,
unrecognized_data...