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Convert javascript array to string
... not dealing with jQuery objects):
var blkstr = $.map(value, function(val,index) {
var str = index + ":" + val;
return str;
}).join(", ");
DEMO
But why use jQuery at all in this case? map only introduces an unnecessary function call per element.
var values = []...
setTimeout in for-loop does not print consecutive values [duplicate]
...e around setTimeout:
for (var i = 1; i <= 3; i++) {
(function(index) {
setTimeout(function() { alert(index); }, i * 1000);
})(i);
}
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Keep overflow div scrolled to bottom unless user scrolls up
...age loads scroll to the bottom of the content. This div has content dynamically added to it and needs to stay scrolled all the way down. Now if the user decides to scroll up I don't want it to jump back to the bottom until the user scrolls all the way down again
...
Check if an array is empty or exists
...y" !== "array"
typeof array == "undefined"; // => true
Case Null
Generally speaking, null is state of lacking a value. For example a variable is null when you missed or failed to retrieve some data.
array = searchData(); // can't find anything
array == null; // => true
Case Not a...
Breaking out of a nested loop
...using goto is any worse than the normal use of something like break (after all they're both just unconditional branches to a label, it's just that with break the label is implicit).
– Greg Beech
Nov 28 '08 at 0:07
...
How to see log files in MySQL?
... = /var/log/mysql/mysql-slow.log
long_query_time = 2
log-queries-not-using-indexes
step3: save the file and restart mysql using following commands
service mysql restart
To enable logs at runtime, login to mysql client (mysql -u root -p) and give:
SET GLOBAL general_log = 'ON';
SET GLOBAL slow_...
How to identify unused css definitions
...l and it shows me the unused css, but how to use it then? Do I have to manually search each item and remove it?
– Timothée HENRY
Feb 27 '13 at 14:35
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App Inventor 2 低功耗蓝牙 BlueToothLE 拓展 · App Inventor 2 中文网
...试具有响应能力的写入特征UUID。
CharacteristicByIndex – 从已连接设备支持的特征列表中返回指定索引的特征UUID，索引从 1 开始。
参数:
index (number) —
特征的索引，必须介于 1 和特征列表的长度之间...
App Inventor 2 中文网VIP专享内容 · App Inventor 2 中文网
...函数式编程轻松实现高级排序算法
【后端源码】PHP 示例的 Node.js 与 Python 对应实现、下载与运行说明
您的改进建议 联系方式： 不需要回复的可留空~ 意见反馈（300字以...
How do I get the first n characters of a string without checking the size or going out of bounds?
...ava without doing a size check first (inline is acceptable) or risking an IndexOutOfBoundsException ?
9 Answers
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